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The Brain

A+P chapter 14

cerebrum thinking part of brain/ has lobes
Blood Brain Barrier maintains a stable environment for brain/ prevents flux of hormones, ions and amino acids
meninges coverings of the brain
dura mater outermost meninx/ double-layered/ means tough mother
arachnoid mater never dips into sulci/ loose brain covering
subdural space narrow cavity between AM and DM
subarachnoid space space between AM and PM/ filled with CSF
pia mater gentle mother/ delicate tissue/ clings tightly to the brain
cerebrospinal fluid watery, plasmalike fluid in brain containing glucose, urea, cations and some WBCs
roles of CSF mechanical and chemical protection, circulation
medulla oblongata has a cross over of motor fibers
pons relat station for brain
inferior colliculi startle reflex (auditory)
superior colliculi visual reflex
cerebellum coordinate voluntary movements/ receives and processes inputs/ provides timing for movements
diencephalon central core of forebrain
thalamus edits and sorts information coming to cerebrum
hypothalamus main visceral control center
autonomic control center involuntary/ BP, pupil size, heart rate
epithalamus produces melatonin/ regulates sleep/wake and mood cycles
cerebral cortex another word for gray matter
gyri elevated ridges of tissue
sulci shallow groove between gyri
fissure deeper groove than gyri
cerebral white matter myelinated nerve fibers grouped into large tracts
association tract connect area within single hemi/ connect adjacent gyri and specific lobes
commissural tract corpus callosum/ connect corresponding areas of right and left hemis
projection tract ties cortex with the rest of nervous system
limbic system the "emotional brain"
functions of cerebral cortex consiousness, perception, communication, memory, appreciation, and understanding
sensory area mediate concsious awareness of sense information
motor area control voluntary movements
association area integrate information for purposeful action
contra-lateral term used when each hemisphere is concerned with sensory and motor functions of the OPPOSITE side of the body
lateralization term used when two hemispheres are not entirely equal but there is some specialization
Created by: ashley814