lab final

Question 1

1st synapse for fine touch/ vibrotactile and conscious proprioceptive info for lower extremeties.
afferent; fasciculus gracilis
efferent; medial lemniscus

Answer 1

nucleus gracilis

Question 2

first synapse for fine tocuh/vibrotactile and conscious proprioceptive info for UPPER EXTREMETIES
aff; fasciculus cuneatus
efferent; medial lemniscus

Answer 2

nucleus cuneatus

Question 3

first synapse for UNCONSCIOUS proprioceptive info for upper half of body’afferent; cuneocerebellar tract

Answer 3

accessory cueate

Question 4

1st synapse for temp. pain, light touch of face

receives fibers from CN 5, 7, 9, and 10

Answer 4

spinal trigeminal nucleus

Question 5

major sensory afferent relay of ANS
rostral receives afferent taste input
major CN that synapse here; 7,9,10

Answer 5

nucleus of the solitary tract

Question 6

loose collection of nuclei thru all levels of braistem

integrative fxns, like motor control, autonomic input, and regulation of behavioral state (sleep/ awake)

Answer 6

reticular formation

Question 7

descendign fibers of voluntary motor control from the cortex and projecting into spinal cord (corticospinal tract)
80% Deccussate at level of medulla

Answer 7

pyramids

Question 8

ascending 2nd order sensory fibers carrying fine tocuh/ vibrotactile and conscious proprioceptive info to the VPL of thalamus from post/dorsal columns

Answer 8

medial lemniscus

Question 9

ascending temp/ pain/ and light touch pathway.
contralateral info at level of medulla.
Lissauer’s fasciculus gives it input
project to VPL of thalamus
CVA in thalamus disrupts this tract and can cause thalamic pain

Answer 9

spinothalamics (anterior and lateral)

Question 10

bundel of ascending, decussating 2nd order sensory fiber carrying fine touch/ vibrotactile/ and conscious proprioceptive info to VPL from post/ddorsal columns
deccussate after synapse at nucleus gracilis/cuneatus

Answer 10

internal arcuate decussation

Question 11

first synapse for temp, pain, and light touch of face
fibers from CN 5, 7, 9, and 10 in relation to somatosensory input from ear
part of the ventral trigeminothalamic tract
involved w trigemianl neuralgia

Answer 11

spinal trigeminal nucleus

Question 12

1st synapse at afferent vestibular info from scarpa’s ganglia and someitems collection of primary sensory afferent cell bodies from inner ear
projects to cerebellum via vestibulocerebellar pathway and occulomtor muscels via MLF
sends descending projections to spinal cord= regulation trunk motor control and extensor muscles via vestibulospinal tract

Answer 12

vestibular nucleus

Question 13

large nucleus in medulla
sedns contra projections to cerebellum via olivocerebellar tract
terminate as “climbing fibers” on purkinje cells
receives cerebellar output info for learning complex motor tasks

Answer 13

inferior olivary nucleus

Question 14

brainstem LMN pool
axons innervate muscles of larynx and pharynx
part of CN 9, 10, and 11

Answer 14

nucleus ambiguus

Question 15

major motor nucleus contains lower motor axons>muscles of ipsilateral tongue
part of CN 12

Answer 15

hypoglossal nerve

Question 16

major preganglionic parasymp motor nucleus of CN 10.

innervates lungs, heart, stomach, and GI tract

Answer 16

dorsal motor nucleus of CN 10

Question 17

inferior most of 3 bundles of axons that connect cerebellum>brainstem.
most unconscious proprioceptive input enters cerebellum thru this (all the cerebellar tracts)
also cerebellar efferent axons> vestibular nuclei

Answer 17

inferior cerebellar peduncle

Question 18

ascending and decsending fiber tract.
connects vestibular nuclei with CN 3, 4, and 6, along with head, neck, and trunk muscles to regulate vestibulooccular reflexes and coordination

Answer 18

medial longitudinal fasciculus

Question 19

space in ventral hindbrain

contains csf and choroid plexus

Answer 19

4th ventricle

Question 20

major CNS center of NE production
found in pons, projects throughout the brain
part of ascending reticular activating system
involved with arousal and alertness

Answer 20

locus ceruleus

Question 21

superior most of 3 large bundles of axons connecting cerebellum to the brainstem
most cerebellar efferents exit cerebellum here
ventral spinocerebellar tract enters the cerebellum thru this

Answer 21

superior cerebellar peduncle

Question 22

middle of 3 large bundles of axons from that connect the cerebellum to the brainstem.
cortical input to the cerebellum synapses on ipsilateral pontine nuclei then decussates to cerebellum via this peduncle.
coordinating movements

Answer 22

middle cerebellar peduncle

Question 23

dorsal portion of pons that contains reticular formation and CN nuclei (sensory and motor)
comprises floor of the 4th ventricle

Answer 23

pontine tegmentum

Question 24

space in ventral hindbrain containing CSF

Answer 24

4th ventricle

Question 25

ventral portion of pons that contains cortico-ponto-cerebellar, corticospinal, and corticobulbar fibers as well as pontine nuclei

Answer 25

basis pontis

Question 26

part of the midbrain roof, involved in eye tracking and saccades part of basal ganglia circuit involving sunstantia nigra pars reticulat. receives afferent input from frontal eye fields and visual association cortices sends motor output to oculomotor nuclei to the head and neck via the tectospinal tract

Answer 26

superior colliculus

Question 27

lower motor neuron nucleus of CN3. regulates pupillary light response through projections to ciliary gg. (post gg for spinchter pupillae) accommodation reflex

Answer 27

nucleus of edinger westphal nucleus

Question 28

major midbrain site contains 2 portions 1; pars compacta (dopamine that project to the striatum) 2. pars reticulata (neurons involved in saccades and visual tracking neuronal cell loss in pars compacta= parkinsons

Answer 28

substantia nigra

Question 29

large midbrian nucleus receiving cerebellar info sends descending fibers down to rostral spinal cord via rubrospinal tract upper body flexor muscle control bi-directional communication with reticular formation

Answer 29

red nucleus

Question 30

descending fibers of voluntary motor control from the cortex and projecting to spinal cord (corticospinal and bulbar tracts) at level of midbrain, cortical input is ipsi

Answer 30

crus cerebri

Question 31

area surrounding cerebral aqueduct that receives nocioceptive info and projects to the serotonergic raphe nuclei as a part of a major pain inhibiting pathway in the spinal cord

Answer 31

periaqueductal grey