part+2+and+3+bain+cranial+nerves.docx - Part 2 and 3...

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Part 2 and 3 cranial nerves9.11 Meninges= membranes located between bone and soft tissues of the nervous systemDura mater = outmost layer, blood vessels, nervesArachnoid mater = no blood vessels, located betweenPia mater = contains many nerves and blood vessels to nourish cells of brain and spinalcord*Cerebrospinal fluid = between arachnoid and pia maters
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9.12 Spinal Cord- nerve column, passes from brain down through the vertebral canal- has 31 segments, each with a pair of spinal nervesCervical enlargement = supplies nerves to upper limbs (neck)Lumbar enlargement = supplies nerves to the lower limbs (lower back)FUNCTION: conducting nerve impulses, serves as a center for spinal reflexesAscending tracts = carry sensory info to the brainDescending tracts = carry motor impulses from the brain to the musclesSpinal reflexes – reflex arcs pass through the spinal cord
9.13 BrainThree Major Parts:Cerebrum – largest, sensory and motor functions, higher mental function (memory,reasoning)Cerebellum – coordinate voluntary musclesBrain stem – regulate visceral functionsDESCRIBE THE FUNCTIONS:1. Cerebral Hemispheres2. Corpus Callosum3. Convolutions / Sulcus / Gyrus4. Transverse / Lateral / Longitudinal Fissures
Lobes of the Brain5. Frontal Lobe6. Parietal Lobe
7. Temporal Lobe8. Occipital Lobe9. Cerebral Cortex10. Ventricles11. Cerebrospinal FluidFunctional Regions:12. Motor13. Sensory14. AssociationDIENCEPHALON & BRAIN STEM1. Diencephalon2. Thalamus3. Hypothalamus4. Optic Tract / Chiasma5. Midbrain6. Pons7. Medulla8. Pituitary Gland9. Hippocampus10. Limbic System
Notes: 9.14, 9.15Peripheral Nervous System - consists of the nerves that branch out from the CNS and

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Term
Winter
Professor
Mrs.Puckett
Tags
cervical nerves, sacral nerves, lumbar nerves, Hypoglossal nerve

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