Lobes of the Cerebrum

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Lobes of the Cerebrum

• 1 frontal
• 2 parietal
• 3 occipital

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More on the Cerebrum

• 1 precentral gyrus
• 2 central sulcus
• 3 postcentral gyrus
• 4 longitudinal fissure
• 5 pia mater

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Review of Brain parts

• 1 frontal lobe
• 2 prefrontal cortex
• 3 premotor
• 4 parietal
• 5 premotor cortex (motor)
• 6 central sulcus
• 7 postcentarl (sensory)
• 8 parietal-occipital sulcus

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Spinal cord
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• The peripheral nervous system (PNS) is
  composed of two systems the afferent nervous
  system and the efferent nervous system.  The
  afferent nervous system brings information into
  the brain from the sensory receptors.  The
  efferent nervous system is the part of the PNS
  that deals with carrying the signals from the
  central nervous system to the body.  

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Nerves

•   There are 12 pair cranial nerves and 31 pairs
  of spinal nerves in humans.  These nerves connect
  the PNS to the CNS.  Most contain both afferent
  and efferent neurons however, the olfactory
  (smell) and optic (sight) contain only afferent
  neurons. WHY?

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THE CRANIAL NERVES an aid to memory

• Mnemonic (memory-aiding) sentence or phrase to
  help remember
• Old olfactory I
• Opie optic II
• occasionally oculomotor III
• tries trochlear IV
• trigonometry trigeminal V
• and abducens VI
• feels facial VII
• very vestibulocochlear VIII
• gloomy, glossopharygeal IX
• vague, vagus X
• and accessory XI
• hypoactive hypoglossal XII

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• 1.   Olfactory Bulb2.   Optic Nerve3.  
  Oculomotor Nerve4.   Trochlear Nerve5.  
  Trigeminal Nerve6.   Abducens Nerve7.   Facial
  Nerve8.   Vestibulocochlear Nerve9.  
  Glossopharyngeal Nerve10.  Vagus Nerve11. 
  Accessory Nerve12.  Hypoglossal Nerve

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• 31 pairs of spinal nerves. How are they
  named/identified?
• They include
• 8 cervical (C1-C8)
• 12 thoracic (T1-T12)
• 5 lumbar (L1-L5)
• 5 sacral (S1-S5)
• 1 coccygeal (Co)

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