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BrendaBarckCentralNervousSystem.pdf (Cerebrum (LOBES (Frontal Lobe (some…
BrendaBarckCentralNervousSystem.pdf
Cerebrum
Postcentral Gyri
Sensory-Somatosensory! Pain, touch, pressure
Precentral Gyri
Motor control! Voluntary movements
LOBES
Frontal Lobe
some memory, think, plan, make decisions
Parietal Lobe
sensory! receives and processes it
Occipital Lobe
visual cortex
Temporal Lobe
auditory, language and comprehension
Insula
visceral sensory cortex-taste, and sensations
Broca area
Speech-talking! In the frontal lobe
Wernicke area
Language! Understanding speech. In the temporal lobe
Tracts
Commissural
messages sent from one hemisphere to the other
Projection
longest tract, signal run vertically (cortex--thalamus, cortex--spinal cord
Association
short, white matter, messages sent in the same hemisphere
Diencephalon
thalamus
all sensory information goes through here (except olfaction), tones down signals
hypothalamus
main visceral control center (don't have to think about)
epithalamus
pineal gland, secretes melatonin
Cerebellum
FUNCTION: coordinate body movements
Cerebellar Peduncles
Middle
efferent pathway-movement signals
Inferior
afferent pathway-proprioceptor signals (sensory)
Superior
efferent pathway-movement signals
Brain Stem
midbrain
pons and medulla oblangata
pons
'bridge' message relay station
medulla oblongata
involved in autonomic behaviors
Spinal Cord
conus medularis
tapered end of the spinal cord (L1 or L2)
cauda equina
'horse tails' nerve roots at end of spinal cord
filum terninale
fibrous connective tissue, connects to the coccyx, anchors the spinal cord
anterior root
ventral, carries motor signals
posterior root
dorsal, carries sensory signals
CNS Protection
Meninges
Arachnoid Matter
spider mother-middle layer-subarachnoid space w. c.s.f.
Pia Matter
gentle mother-directly on brain-very vascular
Dura Mater
tough mother-outer most layer-perosteal and meningeal portion-subdural space (little film of fluid)
epidural space
between bone and dura matter, spine-filled with adipose
dural sinuses
filled with oxygen poor blood, there are five, helps bring blood and nutrirents to brain
subarachnoid space
in the brain and spinal cord, has C.S.F.