492 Sulci PPTs View free & download

Cortical gyri and sulci PowerPoint PPT Presentation

Cortical gyri and sulci - Cortical gyri and sulci From Gray s Anatomy (the book!) Cortical Areas Involved in Phonemic Processing Inferior Parietal Lobe SMG: supramarginal gyrus AG: angular ...

Cortical gyri and sulci From Gray s Anatomy (the book!) Cortical Areas Involved in Phonemic Processing Inferior Parietal Lobe SMG: supramarginal gyrus AG: angular ...

| PowerPoint PPT presentation | free to download

An Integrated Pose and Correspondence Approach to Image Matching PowerPoint PPT Presentation

An Integrated Pose and Correspondence Approach to Image Matching - Interactive 3D Sulcal Tracing. Overview ... Sulcal Graphs: Lohmann and von Cramon. ... Two labeled sulcal point sets, initial position. RPM without label ...

Interactive 3D Sulcal Tracing. Overview ... Sulcal Graphs: Lohmann and von Cramon. ... Two labeled sulcal point sets, initial position. RPM without label ...

| PowerPoint PPT presentation | free to download

Intersubject Normalization for Group Analyses in fMRI PowerPoint PPT Presentation

Intersubject Normalization for Group Analyses in fMRI - FUNDUS. BANK. GYRUS. SULCUS. GYRUS. SULCUS. gray/white border. pial surface. FISSURE ... one cut typically goes along the fundus of the calcarine sulcus though in this ...

FUNDUS. BANK. GYRUS. SULCUS. GYRUS. SULCUS. gray/white border. pial surface. FISSURE ... one cut typically goes along the fundus of the calcarine sulcus though in this ...

| PowerPoint PPT presentation | free to view

Central Nervous System PowerPoint PPT Presentation

Central Nervous System - Sulci (depressions) & Gyri (elevations) Deep layer white matter ... Precentral Gyrus. Anterior to the central sulcus. Primary motor ... Gyrus ...

Sulci (depressions) & Gyri (elevations) Deep layer white matter ... Precentral Gyrus. Anterior to the central sulcus. Primary motor ... Gyrus ...

| PowerPoint PPT presentation | free to view

Nervous System Anatomy PowerPoint PPT Presentation

Nervous System Anatomy - Nervous System Anatomy Meninges Dura mater Arachnoid Pia mater Cerebrum Two hemispheres Sulci Gyri Gray matter White matter Lobes of the Cerebrum Frontal Parietal ...

Nervous System Anatomy Meninges Dura mater Arachnoid Pia mater Cerebrum Two hemispheres Sulci Gyri Gray matter White matter Lobes of the Cerebrum Frontal Parietal ...

| PowerPoint PPT presentation | free to download

CORTICAL ANATOMY AND SYNDROMES Peter M' Grossi MD Sept 14, 2004 PowerPoint PPT Presentation

CORTICAL ANATOMY AND SYNDROMES Peter M' Grossi MD Sept 14, 2004 - Gyri and Sulci define the surface. Sylvian or Transverse sulcus ... Perpendicular to this is the Precentral Gyrus. FRONTAL LOBE ... Agraphia: inability to write ...

Gyri and Sulci define the surface. Sylvian or Transverse sulcus ... Perpendicular to this is the Precentral Gyrus. FRONTAL LOBE ... Agraphia: inability to write ...

| PowerPoint PPT presentation | free to view

MRI of Brain/Head and Neck PowerPoint PPT Presentation

MRI of Brain/Head and Neck - White Matter. Eye Ball. Maxillary Sinus. Tongue. Superior Sagittal Sinus. Nasal Septum ... Falx cerebri. Grey Matter. White Matter. Falx cerebri. Sulcus. Gyri ...

White Matter. Eye Ball. Maxillary Sinus. Tongue. Superior Sagittal Sinus. Nasal Septum ... Falx cerebri. Grey Matter. White Matter. Falx cerebri. Sulcus. Gyri ...

| PowerPoint PPT presentation | free to view

Structure of the Nervous System PowerPoint PPT Presentation

Structure of the Nervous System - All the spinal nerves that innervate the skin, joints, muscles, etc. and under ... Interpeduncular fossa 3. Basis pedunculi 4. Basilar sulcus of pons 5. ...

All the spinal nerves that innervate the skin, joints, muscles, etc. and under ... Interpeduncular fossa 3. Basis pedunculi 4. Basilar sulcus of pons 5. ...

| PowerPoint PPT presentation | free to download

Aquilas Brain Information PowerPoint PPT Presentation

Aquilas Brain Information - ... in front of the central sulcus. Damage can result mood changes. ... Located behind the central sulcus. Temporal lobe. The temporal lobe is important to the ...

... in front of the central sulcus. Damage can result mood changes. ... Located behind the central sulcus. Temporal lobe. The temporal lobe is important to the ...

| PowerPoint PPT presentation | free to view

Brain Surface Cortex Registration PowerPoint PPT Presentation

Brain Surface Cortex Registration - sulcus. 8. 8. Which crest lines are used? We use only 3 crest lines corresponding to ... Rigid Registration for Sulci Labeling. Method Randomized Iterative ...

sulcus. 8. 8. Which crest lines are used? We use only 3 crest lines corresponding to ... Rigid Registration for Sulci Labeling. Method Randomized Iterative ...

| PowerPoint PPT presentation | free to view

Fri, Feb 10 - office hours (M-3-551): Monday 3-4; Tuesday 11-12; or by appt. Marisa DiFronzo tutor ... Sulci - plural of sulcus - deep valleys in the folds ...

office hours (M-3-551): Monday 3-4; Tuesday 11-12; or by appt. Marisa DiFronzo tutor ... Sulci - plural of sulcus - deep valleys in the folds ...

| PowerPoint PPT presentation | free to view

The Central Nervous System PowerPoint PPT Presentation

The Central Nervous System - CNS composed of the brain and ... Frontal, parietal, temporal, occipital, and insula ... Parieto-occipital sulcus separates the parietal and occipital lobes ...

CNS composed of the brain and ... Frontal, parietal, temporal, occipital, and insula ... Parieto-occipital sulcus separates the parietal and occipital lobes ...

| PowerPoint PPT presentation | free to view

Skull, Brain and Cranial Nerves PowerPoint PPT Presentation

Skull, Brain and Cranial Nerves - Occipital. Sphenoid. Ethmoid. Parietal (2) Temporal (2) Facial 14 ... Occipital. Temporal. Insula. Created by deep sulci. Functional areas: motor, sensory ...

Occipital. Sphenoid. Ethmoid. Parietal (2) Temporal (2) Facial 14 ... Occipital. Temporal. Insula. Created by deep sulci. Functional areas: motor, sensory ...

| PowerPoint PPT presentation | free to view

Big Picture - limbic system (stuff around brain stem) Midbrain (top of ... Occipital lobe. Parietal. Temporal. Frontal. Limbic. terms. gyri (hills or folds) sulci (valleys) ...

limbic system (stuff around brain stem) Midbrain (top of ... Occipital lobe. Parietal. Temporal. Frontal. Limbic. terms. gyri (hills or folds) sulci (valleys) ...

| PowerPoint PPT presentation | free to view

HigherOrder Cerebral Function PowerPoint PPT Presentation

HigherOrder Cerebral Function - Only 1/3 of surface area visible, 2/3 in banks of sulci. Surface of gyri and sulci ... Spontaneous speech has normal fluency, prosody and grammatical structure but ...

Only 1/3 of surface area visible, 2/3 in banks of sulci. Surface of gyri and sulci ... Spontaneous speech has normal fluency, prosody and grammatical structure but ...

| PowerPoint PPT presentation | free to view

CARDIOVASCULAR SYSTEM PowerPoint PPT Presentation

CARDIOVASCULAR SYSTEM - Anterior to Esophagus, Descending Aorta. Heart Surface Anatomy. Sulci ... O2 Rich Blood from Left Atrium to Aorta (Systemic Circ.) Heart - Septa. Internal Walls ...

Anterior to Esophagus, Descending Aorta. Heart Surface Anatomy. Sulci ... O2 Rich Blood from Left Atrium to Aorta (Systemic Circ.) Heart - Septa. Internal Walls ...

| PowerPoint PPT presentation | free to view

The Neuropsychology PowerPoint PPT Presentation

The Neuropsychology - Psychosis is often discussed as if it is a well defined unitary ... Pneumoencephalogram showing enlarged sulci. Probably the first neuroimage of psychosis. ...

Psychosis is often discussed as if it is a well defined unitary ... Pneumoencephalogram showing enlarged sulci. Probably the first neuroimage of psychosis. ...

| PowerPoint PPT presentation | free to view

SYLVIAN FISSURE ASYMMETRY IN NORMAL YOUNG ADULTS C'M' Leonard, S'D' Towler, S' Welcome, L' Halderman PowerPoint PPT Presentation

SYLVIAN FISSURE ASYMMETRY IN NORMAL YOUNG ADULTS C'M' Leonard, S'D' Towler, S' Welcome, L' Halderman - Central sulcus indicated in red. Arrowhead indicates origin of ascending ... Fissures were classified as 1 or 4 if they received 2 or more ratings of 1 or 4. ...

Central sulcus indicated in red. Arrowhead indicates origin of ascending ... Fissures were classified as 1 or 4 if they received 2 or more ratings of 1 or 4. ...

| PowerPoint PPT presentation | free to download

Tensorbased Surface Modeling and Analysis PowerPoint PPT Presentation

Tensorbased Surface Modeling and Analysis - Left: The Gyri are extracted by thresholding the thin-plate ... growth along the left inferior frontal gyrus and shrinkage in the left superior frontal sulcus. ...

Left: The Gyri are extracted by thresholding the thin-plate ... growth along the left inferior frontal gyrus and shrinkage in the left superior frontal sulcus. ...

| PowerPoint PPT presentation | free to download

BIO 210 Lab Handout PowerPoint PPT Presentation

BIO 210 Lab Handout - Cerebral Cortex gray matter of the brain; it is located in the gyri. Cerebrum 4 Lobes ... Gyrus. Sulcus. Cerebral cortex. I Olfactory bulb sensory for smell ...

Cerebral Cortex gray matter of the brain; it is located in the gyri. Cerebrum 4 Lobes ... Gyrus. Sulcus. Cerebral cortex. I Olfactory bulb sensory for smell ...

| PowerPoint PPT presentation | free to view

Analyzing the Developing Brain by Quantifying Curvature Measures PowerPoint PPT Presentation

Analyzing the Developing Brain by Quantifying Curvature Measures - ... MGH Center for Morphometric Analysis Curvature Information at Each Vertex of Reconstructed Surface Reconstructed surfaces were analyzed with curvature ...

... MGH Center for Morphometric Analysis Curvature Information at Each Vertex of Reconstructed Surface Reconstructed surfaces were analyzed with curvature ...

| PowerPoint PPT presentation | free to download

SANTRAL SINIR SISTEMI ANATOMISI PowerPoint PPT Presentation

SANTRAL SINIR SISTEMI ANATOMISI - BOS komponentleri kandan ventrik llere kapiller endoteli ... cisterna fossa cerebri lateralis -cisterna venae cerebri magna. MSS Kan Dolasimi. A.subclavia ...

BOS komponentleri kandan ventrik llere kapiller endoteli ... cisterna fossa cerebri lateralis -cisterna venae cerebri magna. MSS Kan Dolasimi. A.subclavia ...

| PowerPoint PPT presentation | free to view

A Brief Intro to Cortical Neuroanatomy - A Brief Intro to Cortical Neuroanatomy

A Brief Intro to Cortical Neuroanatomy

| PowerPoint PPT presentation | free to view

Outer Surface of Human Brain PowerPoint PPT Presentation

Outer Surface of Human Brain - Title: Slide 1 Author: Susan Garnsey Last modified by: Susan Garnsey Created Date: 2/16/2006 10:18:45 PM Document presentation format: On-screen Show

Title: Slide 1 Author: Susan Garnsey Last modified by: Susan Garnsey Created Date: 2/16/2006 10:18:45 PM Document presentation format: On-screen Show

| PowerPoint PPT presentation | free to view

Intersubject Normalization for Group Analyses in fMRI - Jody Culham Department of Psychology University of Western Ontario http://www.fmri4newbies.com/ Intersubject Normalization for Group Analyses in fMRI

Jody Culham Department of Psychology University of Western Ontario http://www.fmri4newbies.com/ Intersubject Normalization for Group Analyses in fMRI

| PowerPoint PPT presentation | free to view

Neuroanatomy and Function - Neuroanatomy and Function

Neuroanatomy and Function

| PowerPoint PPT presentation | free to view

Sheep Brain Dissection PowerPoint PPT Presentation

Sheep Brain Dissection - Sheep Brain Dissection By: Ryan Begun and Nick Palladino and Mr. Davis The Dura Mater The dura mater is a thick durable membrane covering the brain and closest to the ...

Sheep Brain Dissection By: Ryan Begun and Nick Palladino and Mr. Davis The Dura Mater The dura mater is a thick durable membrane covering the brain and closest to the ...

| PowerPoint PPT presentation | free to download

Brain Recording - Brain Recording

Brain Recording

| PowerPoint PPT presentation | free to view

CNS - Central cavity surrounded by a gray matter core ... Motor homunculus caricature of relative amounts of cortical tissue devoted to ...

Central cavity surrounded by a gray matter core ... Motor homunculus caricature of relative amounts of cortical tissue devoted to ...

| PowerPoint PPT presentation | free to download

Introduction to fMRI - Introduction to fMRI

Introduction to fMRI

| PowerPoint PPT presentation | free to view

CEREBRUM - ... 1,2)-receiving touch sensation, muscle-stretch information and ... Auditory area B. Area 41 & 42. Olfactory area B. Area 28. Fatima Jinnah Dental College ...

... 1,2)-receiving touch sensation, muscle-stretch information and ... Auditory area B. Area 41 & 42. Olfactory area B. Area 28. Fatima Jinnah Dental College ...

| PowerPoint PPT presentation | free to view

Intersubject Normalization for Group Analyses in fMRI - Title: Variability of HRF Author: jculham Last modified by: Jody Culham Created Date: 12/18/2001 3:45:32 AM Document presentation format: On-screen Show (4:3)

Title: Variability of HRF Author: jculham Last modified by: Jody Culham Created Date: 12/18/2001 3:45:32 AM Document presentation format: On-screen Show (4:3)

| PowerPoint PPT presentation | free to view

Cerebral Cortex PowerPoint PPT Presentation

Cerebral Cortex - Human cortical expansion not strictly due. to enlarged motor or primary sensory areas ... Arcuate fasciculus. Inferior longitudinal fasc. ...

Human cortical expansion not strictly due. to enlarged motor or primary sensory areas ... Arcuate fasciculus. Inferior longitudinal fasc. ...

| PowerPoint PPT presentation | free to download

Neuroanatomy Tutorial PowerPoint PPT Presentation

Neuroanatomy Tutorial - Neuroanatomy Tutorial This is the first of 3 digital resources provided to you as part of your Neuroanatomy lab for today. Please use these online tools as you see ...

Neuroanatomy Tutorial This is the first of 3 digital resources provided to you as part of your Neuroanatomy lab for today. Please use these online tools as you see ...

| PowerPoint PPT presentation | free to download

4.1b. Pre-contrast Axial T1 Wtd MRI PowerPoint PPT Presentation

4.1b. Pre-contrast Axial T1 Wtd MRI - E 40-year old lady with a history of breast carcinoma ... Note the pathology is not seen in ... MRI is more sensitive than CT imaging to detect metastatic ...

E 40-year old lady with a history of breast carcinoma ... Note the pathology is not seen in ... MRI is more sensitive than CT imaging to detect metastatic ...

| PowerPoint PPT presentation | free to download

QUESTION 1 - The information you have obtained for MCQ exam are more than enough for OSPE. THANK YOU & GOOD LUCK . Title: QUESTION 1 Author: user1 Last modified by: Gamilah H. Al ...

The information you have obtained for MCQ exam are more than enough for OSPE. THANK YOU & GOOD LUCK . Title: QUESTION 1 Author: user1 Last modified by: Gamilah H. Al ...

| PowerPoint PPT presentation | free to view

Brainstem I - Interpeduncular fossa. Basilar pons. Pyramids & decussation. Olives ... Rhomboid fossa. Tuberculum Gracilis. Tuberculum Cuneatus. Tuberculum Cinereum ' ...

Interpeduncular fossa. Basilar pons. Pyramids & decussation. Olives ... Rhomboid fossa. Tuberculum Gracilis. Tuberculum Cuneatus. Tuberculum Cinereum ' ...

| PowerPoint PPT presentation | free to download

Functional Neuroanatomy PowerPoint PPT Presentation

Functional Neuroanatomy - Rostral / Caudal. Anterior / Posterior. Superior / Inferior. Lateral / Medial. 4 Lobes of the Brain ... Sub-cortical structures (basal ganglia, limbic system) ...

Rostral / Caudal. Anterior / Posterior. Superior / Inferior. Lateral / Medial. 4 Lobes of the Brain ... Sub-cortical structures (basal ganglia, limbic system) ...

| PowerPoint PPT presentation | free to view

Jerry L' Prince - Jerry L' Prince

Jerry L' Prince

| PowerPoint PPT presentation | free to view

Chapter 1 Basic Anatomy PowerPoint PPT Presentation

Chapter 1 Basic Anatomy - Chapter 1 Basic Anatomy Chris Rorden Coordinates Introduction to the nervous system Multiple choice What is an example of a common mnemonic? Someone with blue eyes.

Chapter 1 Basic Anatomy Chris Rorden Coordinates Introduction to the nervous system Multiple choice What is an example of a common mnemonic? Someone with blue eyes.

| PowerPoint PPT presentation | free to download

Human Anatomy PowerPoint PPT Presentation

Human Anatomy - Human Anatomy Central Nervous System Part I The Brain CNS Consists of 2 anatomical components The Brain 3 subdivisions A. Cerebrum B. Cerebellum Brainstem Additional ...

Human Anatomy Central Nervous System Part I The Brain CNS Consists of 2 anatomical components The Brain 3 subdivisions A. Cerebrum B. Cerebellum Brainstem Additional ...

| PowerPoint PPT presentation | free to view

Head CT Basics : Trauma PowerPoint PPT Presentation

Head CT Basics : Trauma - Head CT Basics : Trauma ... Very Small Epidural Hematoma with fracture Epidural with Pneumocephaly Subdural Hematoma Follows the contour of the brain & doesn t ...

Head CT Basics : Trauma ... Very Small Epidural Hematoma with fracture Epidural with Pneumocephaly Subdural Hematoma Follows the contour of the brain & doesn t ...

| PowerPoint PPT presentation | free to download

Human Anatomy - Surface forms a series of elevated ridges gyri (gyrus, sng. ... Controls motor functions associated with rage, pleasure, pain and sexual arousal ...

Surface forms a series of elevated ridges gyri (gyrus, sng. ... Controls motor functions associated with rage, pleasure, pain and sexual arousal ...

| PowerPoint PPT presentation | free to view

Head CT Basics : Trauma - Title: No Slide Title Author: Micelle Haydel, MD Last modified by: e.marvez Created Date: 2/8/1999 3:57:14 AM Document presentation format: On-screen Show

Title: No Slide Title Author: Micelle Haydel, MD Last modified by: e.marvez Created Date: 2/8/1999 3:57:14 AM Document presentation format: On-screen Show

| PowerPoint PPT presentation | free to download

Cerebrum - Pre-Central Gyrus (Primary Motor Cortex) Post-Central ... Mammillary Body (Part of Hypothalamus) Corpora Quadridgemina. Occipital Lobe. 11. Corpus Callosum ...

Pre-Central Gyrus (Primary Motor Cortex) Post-Central ... Mammillary Body (Part of Hypothalamus) Corpora Quadridgemina. Occipital Lobe. 11. Corpus Callosum ...

| PowerPoint PPT presentation | free to view

Ex. 29 Sheep Brain PowerPoint PPT Presentation

Ex. 29 Sheep Brain - ... (thalamus, hypothalamus, optic chiasma, mammillary bodies, pineal gland) Brainstem ... pineal gland. http://www.gwc.maricopa.edu/class/bio201/brain/brshpx.htm ...

... (thalamus, hypothalamus, optic chiasma, mammillary bodies, pineal gland) Brainstem ... pineal gland. http://www.gwc.maricopa.edu/class/bio201/brain/brshpx.htm ...

| PowerPoint PPT presentation | free to view

Sheep Brain Dissection Guide PowerPoint PPT Presentation

Sheep Brain Dissection Guide - Sheep Brain Dissection Guide Good Luck!! Meninges of the Brain Brain is protected by the skull and 3 layers of membranes called meninges Observe Meninges Examine the ...

Sheep Brain Dissection Guide Good Luck!! Meninges of the Brain Brain is protected by the skull and 3 layers of membranes called meninges Observe Meninges Examine the ...

| PowerPoint PPT presentation | free to download

Approach to Head CT PowerPoint PPT Presentation

Approach to Head CT - ... and abdominal films can give you clues to possible brain pathology ... noted all the basic information about the scan, it's time to look at the scan itself ...

... and abdominal films can give you clues to possible brain pathology ... noted all the basic information about the scan, it's time to look at the scan itself ...

| PowerPoint PPT presentation | free to view

Anatomy for Neuroimaging PowerPoint PPT Presentation

Anatomy for Neuroimaging - Anatomy for Neuroimaging J. Keith Smith, M.D., Ph.D. Neuroradiology Neuro-Anatomy Skull and Meninges (Dura, Pia) Vasculature: Veins and Arteries Surface Anatomy-Lobes ...

Anatomy for Neuroimaging J. Keith Smith, M.D., Ph.D. Neuroradiology Neuro-Anatomy Skull and Meninges (Dura, Pia) Vasculature: Veins and Arteries Surface Anatomy-Lobes ...

| PowerPoint PPT presentation | free to download

Chapter 18, The Heart PowerPoint PPT Presentation

Chapter 18, The Heart - Chapter 18, The Heart. Class demonstrations. Two main functions. Pulmonary circulation ... Path of blood through the heart. Superior & inferior vena cava and ...

Chapter 18, The Heart. Class demonstrations. Two main functions. Pulmonary circulation ... Path of blood through the heart. Superior & inferior vena cava and ...

| PowerPoint PPT presentation | free to view

Anatomy for Neuroimaging - ... Nagae-Poetscher LM, van Zijl PC, Mori S. Fiber tract-based atlas of human white matter anatomy. Radiology. 2004 Jan;230(1):77-87. Epub 2003 Nov 26.

... Nagae-Poetscher LM, van Zijl PC, Mori S. Fiber tract-based atlas of human white matter anatomy. Radiology. 2004 Jan;230(1):77-87. Epub 2003 Nov 26.

| PowerPoint PPT presentation | free to download

Central Nervous System: - Central Nervous System: CNS Spinal Cord Brain

Central Nervous System: CNS Spinal Cord Brain

| PowerPoint PPT presentation | free to view

THE BRAIN - THE BRAIN MAIN PARTS OF THE BRAIN 1. Brain stem - continuous with spinal cord - consists of medulla oblongata, pons, & midbrain 2.

THE BRAIN MAIN PARTS OF THE BRAIN 1. Brain stem - continuous with spinal cord - consists of medulla oblongata, pons, & midbrain 2.

| PowerPoint PPT presentation | free to download

MRI findings in Kallmann syndrome PowerPoint PPT Presentation

MRI findings in Kallmann syndrome - MRI findings in Kallmann syndrome H. ZAGHOUANI BEN ALAYA, Z. ACHOUR, M.BHOURI, M. LIMEME, S. MAJDOUB, H. AMARA, D. BAKIR, CH. KRAIEM HN27 INTRODUCTION: Kallmann ...

MRI findings in Kallmann syndrome H. ZAGHOUANI BEN ALAYA, Z. ACHOUR, M.BHOURI, M. LIMEME, S. MAJDOUB, H. AMARA, D. BAKIR, CH. KRAIEM HN27 INTRODUCTION: Kallmann ...

| PowerPoint PPT presentation | free to download

OSTRACODA - The outer surfaces of the ostracod valves can be smooth or ornamented with pits, ... Ostracods grow by moulting. There are usually eight moults between the egg ...

The outer surfaces of the ostracod valves can be smooth or ornamented with pits, ... Ostracods grow by moulting. There are usually eight moults between the egg ...

| PowerPoint PPT presentation | free to view

Chapter 12 Central Nervous System Part 1 PowerPoint PPT Presentation

Chapter 12 Central Nervous System Part 1 - Chapter 12 Central Nervous System Part 1 Angela Peterson-Ford, PhD apetersonford@collin.edu Central Nervous System (CNS) CNS composed of the brain and spinal cord ...

Chapter 12 Central Nervous System Part 1 Angela Peterson-Ford, PhD apetersonford@collin.edu Central Nervous System (CNS) CNS composed of the brain and spinal cord ...

| PowerPoint PPT presentation | free to view

Sulci PowerPoint PPT Presentations