Pitt NUR 0012 - Ch. 12 The Central Nervous System: Introduction (3 pages)

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Ch. 12 The Central Nervous System: Introduction



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Ch. 12 The Central Nervous System: Introduction

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Lecture number:
30
Pages:
3
Type:
Lecture Note
School:
University of Pittsburgh
Course:
Nur 0012 - Anatomy and Physiology I
Anatomy and Physiology I Documents
Unformatted text preview:

NUR 0012 Lecture 30 Ch 12 The Central Nervous System Introduction Outline of Last Lecture I Ch 11 fundamentals of the nervous system cont A Graded potentials B Conduction velocities C Synapse D 2 types of local graded potentials that effect neurons E Neurotransmitters Outline of Current Lecture I Ch 12 the central nervous system A 3 major brain divisions B CNS and PNS develop from in folding of surface ectoderm in early embryo C The confines of the skull are the driving force of the shape of the human brain D 4 ventricles deep inside brain E The cerebrum Current Lecture I Ch 12 the central nervous system A 3 major brain divisions 1 Cerebrum thought seeing smelling hearing 2 Brainstem autonomic reflexes life sustaining processes a Midbrain b Pons These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute B C D E c Medulla oblongata 3 Diencephalon mood temperature regulation CNS and PNS develop from in folding of surface ectoderm in early embryo 1 Surface ectoderm becomes skin over the back 2 Neural crest cells become ganglia in PNS created when neural tube closes The confines of the skull are the driving force of the shape of the human brain 1 Week 5 2 major flexures form causing telencephalon and diencephalon to angle toward the brain stem a 2 major flexures midbrain and cervical 2 Week 13 cerebral hemispheres develop and grow posteriolaterally to enclose the diencephalon and the rostral brain stem 3 Birth adult pattern of structures and convolutions 4 ventricles deep inside brain 1 Lateral ventricle 2 Third ventricle 3 Cerebral aqueduct 4 Fourth ventricle 5 CSF is produced in the ventricles and circulates through the CNS more on this later The cerebrum 1 Gray matter cortex is outside and white matter is inside 2 Generalizations a Contains motor sensory and association areas b Each hemisphere concerned with motor and sensory functions of the contralateral side of the body c Functions lateralized d No one area acts alone PET and fMRI 3 Major regions a Longitudinal fissure b Transverse cerebral fissure c Left cerebral hemisphere 4 5 major lobes in cerebral hemisphere a Frontal motor areas mainly here motor homunculus map b Parietal sensory c Occipital sensory d Gyri of insula e Temporal sensory 5 3 major types of white matter fibers in cerebrum a Commissural fibers corpus callosum b Association fibers c Projection fibers 6 Basal nuclei gray matter deep inside cerebrum a Help inhibit unwanted muscle contractions b Disorders of basal nuclei can lead to resting tremors


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