Sheep Brain Dissection

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Sheep Brain Dissection

• By Ryan Begun and Nick Palladino and
• Mr. Davis

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(No Transcript)
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The Dura Mater

• The dura mater is a thick durable membrane
  covering the brain and closest to the skull.
• Surrounds and supports the large venous channels
  carrying blood from the brain toward the heart.

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Pia Mater

• Thin white coating on the brain surface
• Contains blood vessels that supply blood to the
  brain.

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The Cerebrum

• The largest part of the human brain.
• Associated with higher brain functions such as
  thought and action.
• Cerebrum is divided into five lobes.
• Frontal, Parietal, Occipital, Temporal, and
  insula.

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The Cerebellum

• Also known as the little brain
• Associated with regulation and coordination of
  movement, posture, and balance. Involuntary
  Control

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The Brain Stem

• Responsible for vital life functions such as
  breathing, heartbeat and blood pressure.
• The brain stem is made of the midbrain, pons, and
  medulla oblongata.

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Medulla Oblongata

• Controls autonomic functions, such as heart rate,
  respiratory rate, coughing, vomiting etc.
• Relays nerve signals between the brain and spinal
  cord

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The pons

• Involved in the motor control and sensory
  analysis.

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Midbrain

• Relay station for auditory and visual information
• Eye movement

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Frontal Lobe

• Involved in our motor functions.
• Problem solving
• Memory
• Language
• Judgment
• Impulse control
• Houses our personality

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Temporal Lobe

• Associated with perception and recognition of the
  auditory stimuli, memory, and speech.

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Occipital Lobe

• Associated with visual processing
• Helps interprets what the eyes see

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Parietal Lobe

• Associated with movement
• Orientation
• Recognition
• Perception of the stimuli to the body
• Sense of Touch
• Primary Somatosensory Cortex

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Gyri and Sulci

• Gyri is the bumps, elevated ridges in the
  cerebral cortex as shown by the circles.
• Sulci the indentations, shallow grooves, as
  shown by the solid lines

Gyrus
Sulcus
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Pre central gyrus

• Located in front of the central sulcus. First
  Gyrus in the frontal lobe.
• Voluntary movement of skeletal muscles

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Post central gyrus

• In parietal lobe first gyrus behind the central
  sulcus.
• Receives sensory feed back from all over the
  body including
• From joints
• And tendons
• Internal Organs

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Central Sulcus

• Groove, separates frontal and parietal lobes.

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Longitudinal Cerebral Fissure

• Separates the two sides of the cerebrum

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Diencephalon

• Thalamus
• Hypothalamus

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Thalamus

• Processes and relays movement and sensory
  information

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Hypothalamus

• Controlling hunger and thirst
• Emotions
• Body Temperature regulation
• Circadian rhythms
• Other Homeostatic Controls. Read in your book
  about this little but important part of the
  brain.

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Corpus Callosum

• Communication between the left and right
  hemispheres
• Forms roof of lateral and third ventricles
• Myelinated White Matter

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White Matter

• Area where messages pass through
• Develops throughout life.
• Myelinated

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Grey Matter

• Muscle Control
• Sensory Perception
• Seeing
• Hearing
• Memory
• Speech
• Emotions
• UNMYELINATED