Anatomy Study Guide

Anatomy Study Guide - 1 Anatomy Study Guide: CNS- consists...

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Anatomy Study Guide: CNS - consists of brain and spinal chord PNS - rest of nervous system Center - a collection of neuron cell bodies with a common function Nucleus - a center with a discrete boundary Neural Cortex - brain surface covered by this layer of grey matter Higher Center - most complex integration centers of brain Tract- a bundle of axons Column- a bundle of tracts Spinal Reflexes - automatic responses controlled by spinal cord w/o input from brain Grey Matter - contains cell bodies (nuclei) located in ganglia, receives sensory input, sends motor output White Matter - contains bundles of axons called tracts, encircles grey matter Ascending Tracts - in white matter, sends info to brain (sensory pathways) Descending Tracts - in white matter, sends info to grey matter (motor pathways) Onus Medularis - termination site of spinal cord Formation of spinal nerves (2)- dorsal sensory roots and ventral motor roots Dorsal Roots - bring info to spinal cord Ventral Roots - control somatic and visceral effectors Cauda Equina - horses tail that emerges from conus medularis and passes down to lower vertebrae 1
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Spinal Meninges - Dura Mater (outer, contains epidural space), Arachnoid Mater (contains CSF), Pia Mater (inner, contains collagen fibers) Spinal Nerve Tissue Layers - Epineurium (outer, collagen), Perineurium (middle), Endoneurium (inner, surrounds axons) Dorsal Horn - in grey matter of spinal cord, receives sensory info (somatic sensory and visceral sensory) Ventral Horn - send motor info, (somatic motor) Cerebellum - controls conscious and unconscious movements Medulla - controls respiration, heart rate, relays info to higher centers of brain Pons - relays sensory info to cerebellum and thalamus, subconscious levels Corpora Quadrigemina - contains superior colliculi (receives visual info) and inferior colliculi (receives auditory info) RAS (reticular activating system)- controls alertness and waking Thalamus - “filters” extensive signals from the body Hypothalamus - controls emotions and hormone production Epithalamus - secretes melatonin, induces sleepiness Cerebral Hemispheres - conscious thought, memory and learning, conscious control of muscles Limbic System - processes memory and associated emotions Organization of Cerebral Cortex - lobes, fissures, gyri and sucli Function of Cerebral Cortex - precentral gyrus is primary motor cortex, postcentral gyrus is primary sensory cortex 2
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Olfactory (I)- special sensory, hearing Optic (II)- special sensory, vision Occulomotor (III)- motor, eye muscles and glands Trochlear (IV)- mtor, eye muscles\ Trigeminal (V)- mixed, areas associated with jaw Abducens (VI)- motor, lateral rectus muscle Facial (VII)- mixed, taste receptors, facial expressions Vestibulocochlear (VIII)- special sensory, cochlea, vestibule Glossopharyngeal (IX)- mixed, monitors blood pressure, back of tongue,
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This note was uploaded on 03/27/2008 for the course BIOL 252 taught by Professor Johnson during the Spring '07 term at UNC.

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Anatomy Study Guide - 1 Anatomy Study Guide: CNS- consists...

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