anatomy meninges and CNS review Flashcards
outside layer
Tough fibrous outer layer
dural folds hold the brain in position
connects to skull
Dura mater
space filled with cerebrospinal fluid for shock absorption
middle layer
“Spidery”
Arachnoid
Connects to brain
inside layer
highly vascular
pia mater
What is the stucutre of the spinal cord as a whole? What unique features does it have?
divdied into segments
cyndrical
thick at the top near the brain, thinner at the bottom
cauda equina: many nerves leaving (Horse’s tail)
How do the dorsal and ventral roots differ in their function?
Dorsal roots: bring SENSORY information INTO pinal chord
Ventral roots: send MOTOR information OUT of the spinal chord
Transports nutrients, chemical messengers, and wastes
Cerebrospinal fluid
Where is cerebrospinal fluid made?
Chorid plexus
Two places were you can find cerebrospinal fluid
subarachnoid space
central canal
ventricles
where is precentral gyrus found?
frontal lobe
where is post central gyrus found?
parietal lobe
where is medulla oblongata found?
brainstem
where is pons located ?
brainstem
where is midbrain located?
brainstem
precentral gyrus function
directs voluntary movement
response to sensory info –> motor
post central gyrus function
recieves sensations (touch, pain, pressure, temperature)
frontal lobe function:
emotion control
decision making
executive functions
parietal lobe function:
sensory input
memories
occipital lobe function:
vison
Temporal lobe function:
language
hearing
memory
speech
medulla oblongata function
homeostasis control
breathing control (respiration)
digestion
blood pressure
heartbeat regulation
pons function
CONSCIOUSNESS
breathing regulation
relay station
sleep regulation
facial sensation and movement
sensory and motor pathways
midbrain function:
vision and hearing
motor control
alertness
processing/routing information
hypothalamus function:
homeostasis
temperature
thalamus function:
sorts data
processing/routing information
cerebellum function:
body control
motion memory
balance
muscle memory
what separates the two brain hemispheres?
longitudinal fissure
what connects the two hemispheres?
corpus collosum
