SA- all in the skull Flashcards
is there is an incr in CO2 or a decr in O2 cerebral bl vessels will _____
dilate
damage to PICA = _____ sx
S/s:_______
wallenberg sx
s/s: Ipsi loss of (s) to face, contra loss of (s) to body
_____ art. off the vert. art. supplies bl to the anterior 2/3 of the SC
____ art. off the radicular art. supplies bl to the posterior 1/3 of the SC
anterior 2/3rd: anterior spinal art.
posterior 1/3rd: posterior spinal art.
R. carotid art. comes off the ____
Left carotid art. comes off the ___
Bifurcates at:_____
R.: R. Brachiocephalic
L: Aorta
bifurcates at: C3/4
The great cerebral V. of galen drains into the ____ sinus
superior cerebral V. goes int the ____ sinus –> found in the falx cerebri
great cerebral v= straight sinus “Great is staight”
superior cerebral V= superior sagittal sinus
“Superior is superior”
Name the flow of the CSF
Lateral ventricles–> foramen monroe–> 3rd ventricle –> cerebral aqueduct of sylvius –> 4th ventricle –> foramen of magendie & foramen of Lushka –> reabsorbed in arachnoid villi in superior sagittal sinus
damage to middle meningeal art. = ______ hemorrhage
epidural hemorrhage
damage to venous system= ______hemorrhage
subdural hemorrhage
Beri aneurysm = ______ hemorrhage
subarachnoid hemorrhage
Rubrospinal = _____ nucleus
fxn: _____
rubrospinal = Red Nucleus
fxn: prox. M flexors of upper and lower ext.
fxn of the reticulospinal tract?
Extensor M of back and arms
except: back muscles innervated by a plexus
Fxn of the tectospinal tract
also contains the superior and inferior colliculus
- fxn:
Neck Muscles
superior colliculus: reflex to light
inferior colliculus: sound
______ tract goes to the EXTENSOR M’s of the back and legs.
It also supplies the medial longitudinal fascicullus
Vestibulospinal tract
____ motor neurons are ____ fibers for tone of the back extensors
gamma motor neurons
intrafusal fibers for tone
______ tract is for the FLEXORS of the Distal Ext.
Corticospinal (pyramids)
Lateral decussates at: medulla
Ventral decussates at: spinal level
The corticospinal tract for the FLEXORS of the DISTAL ext. decussates:
Lateral tract:____
Ventral tract: ____
Lateral: at the medulla
Ventral: at the spinal level
Proximal muscle flexors of the UE/LE:____ tract
Distal muscle flexors of teh UE/LE: ___tract
Prox: Rubrospinal tract
Distal: Corticospinal tract
____ tract: extensors for the back and ARMS:
_____ tract: extensors for the back and LEGS
Back and arms: Reticulospinal
Back and legs: vestibulospinal
____ fibers are for movement of the muscles. Muscles will use ____ motor neurons for movement
extrafusal fibers= movement
alpha motor neurons
(tone= intrafusal fibers, gamma motor neurons)
_____ blocks pn that comes through the spinothalamic tract
location: Rexed lamina ___
____ tract goes through it
substantia gelatinosa
location: rexed lamina II
tract: tract of lissauer
Name the stucture at each location of the rexed lamina:
II: \_\_\_\_\_ VII:\_\_\_\_ VIII:\_\_\_\_ IX:\_\_\_\_ X:\_\_\_\_
II: Substantia gelatinosa (blocks pn) VII: Nucleus dorsalis of clark VIII: Anterior horn, alpha motor (movement) IX: Anterior horn, gamma motor (tone) X: grey commissure (central canal)
_____ are the receptors for the spinothalamic tract
Fiber type:____
Free naked N endings
type: unmyelinated C fibers
The lateral spinalthalamic tract synapses in the posterior horn in “tract of_____” at the ______
tract of lissauers in the substantia gelatinosa (rexed laminae II)
Where does the lateral spinalthalamic tract decussate across to?
It then travels up the lateral spinothalamic tract to –> _______ –>ends at: ____
Lamina 7
VPL of contra thalamus –> contra cortex
