Test 2 #2 Flashcards
2nd order neurons
dorsal nucleus of clarke
upper arm
cuneate nucleus
what does the Ascending reticular activating system (ARAS) do?
Awareness
Sensory information usually ends up on opposite side of cerebral cortex why?
2nd order neurons cross them up.
which pathways carry pain to cerebrum
spinothalamic
dermatome of upper arm
C5
type of nocioceptor
free nerve ending
stimulus of a stretch receptor
muscle spinds/Gamma neuron
follicular receptor
mechanoreceptor
Vibration
pacinian
left arm/leg weakness
Right cerebellum
does not contain corticobulber fibers
pyramid/lateral corticospinal
patellar reflex is an example of_____
myotatic
fibers cross
withdrawal reflex
motor units____ over time with aging
decrease
Upper arm injury
cuneate tract
excessive contracted prevented by
golgi tendon organ
primary afferent sensory
measure of rate of stretch
gracile fasciculus/nucleus located at?
DRG
Gracile fasciculus fibers cross at
internal arcuate fibers
alpha motor neurons found in
gray matter of spinal cord
proprioceptive sensation of lower limb carried by _____ tract
gracile
nucleus dorsalis is located at ___-___ spinal levels
T1-L2
does not contain corticobular fibers
lateral corticospinal
posterior spinocerebellar tract originates from which nucleus?
Dorsal Thoracic
Neurons in the Spinal Ganglia are
pseudounipolar
Why is the cervical region of the spinal cord the largest?
contains the most white matter
primary NT
Ach
anterior corticospinal tract crosses the ____ of the spinal cord
midline
a simultaneous and opposite patter of activity in the contralateral limb is known as?
crossed effect
35 year old roofer is examined in the emergency department after falling two stories
anterior spinal cord
posterior columns
Gracile and cuneate fasciles
crossing fibers originating from the nucleus called?
internal arcuate fibers
erector spinae is innervated by neurons in the_____
medial ventral horn
What cortical layer contains BETZ cells?
inner pyramidal
raphe spinal tract releases ____ at the spinal cord level
serotonin
