Somatosensory pathways

Question 1

property of ascending fibers

Answer 1

many ascending fibers travels ipsilaterally in the posterior funiculi to gracilis and cunaetus nuclei 2nd ORDER neuron in medulla oblongata

Question 2

what crosses the midline in medulla oblongata

Answer 2

Axons also called as internal arcuate fibers and the travels as medial leminiscus to the VPL in thalamus to 3rd neuron

Question 3

what carries muscle joint sensaton ?

Answer 3

cuneocerebellar tract carries through the inferior cerebellar peduncle

Question 4

anterior spinothalamic tract receives info for?

Answer 4

crude touch and pressure sensation

Question 5

lateral spinothalamic tract receives info for

Answer 5

pain, temperature, tickle, sexual sensation

Question 6

spinothalamic tract receives info for

Answer 6

protopathic sensation

Question 7

where does 1st neuron of lateral spinothalamic tract terminates

Answer 7

secondory sensory neurons in the posterior horn with substantial cells of gelatonisia

Question 8

tell me abt the tract of 2nd neuron in lateral spinothalmic tract

Answer 8

axons of 2nd neurons travel to ant white commissure then go to contralateral side towards the anterolateral funiculus and then ascend

Question 9

what the location of spinal lemniscus

Answer 9

in midbrain it lies in tegmentum , lateral to medial lemniscus

Question 10

which spinocerebellar tract does not cross midline?

Answer 10

posterior one

Question 11

what are the receptor of spinocerebellar tract ?

Answer 11

muscle spindles
golgi tendons
joint receptors

Question 12

where does 1st neuron of posterior spinocerebllar terminate?

Answer 12

dorsal nucleus of clarks C8 TO L3

Question 13

where does 1st neuron of anterior spinocerebllar terminate?

Answer 13

dorsal gray horn L4 TO S3

Question 14

ventroposterior medial nuclei

Answer 14

trigeminal and gustartory pathway( fascial and taste sensation)
E ; primary somatosensory cortex thought posterior limb of internal capsule

Question 15

ventroposterior lateral

Answer 15

Posterior and lateral funiculus ( pain pressure touch vibration ) sensation
E ; primary somatosensory cortex

Question 16

medial geniculate nucleus

Answer 16

auditory info from superior olive and inferior colliculs
auditory cortex of temporal lobe

Question 17

lateral geniculate nucleus

Answer 17

visual info through optic nerve
E; primary visual cortex

Question 18

ventral lateral nucelus ( MOTOR NUCELI)

Answer 18

cerebellum and basal ganglia
primary motor cortex

Question 19

ventral anterior nucleus ( MOTOR NUCELI)

Answer 19

basal ganglia
premotor cortex

Question 20

Anterior nucelus

Answer 20

it is a part of limbic system modulation of alerteness, learning , memory ,
A; mamillary body through mammilothalamic tract, cingulate gyrus
E; Cingulate gyrus

Question 21

dorsal medial nucleus

Answer 21

multitasking , planning, attention , active memory
A; amygdala & olfactory cortex
E; preforontal cortex & limbic system

Question 22

role in alertness and attention (Reticular system)

Answer 22

Thalamic nuclei , reticular activating system , cerebral cortex
E; Dorsal nuclei

Question 23

Central medial nucelus ( interlaminar nuceli )

Answer 23

alertness , awareness, consciousness
A; cerberal cortex , reticular activating system & Internal globus pallidus

Question 24

centromedian nucelus ( interlaminar nuceli )

Answer 24

pain processing
emboliform nucleus
striatum

Question 25

in the fasiculus gracilis the axons crosses at which area ?

Answer 25

Medulla oblongata