Sensory table

Question 1

List the secondary sensory nucleus and ascending lemniscus for the somatosensory protopathic modality. What does this pathway detect (sensations)?

Answer 1

secondary sensory nucleus in the dorsal horn of the spinal cord
ascending lemniscus: spinal lemniscus
detects: pain, non-fine touch, hot/cold, tickle, itch

Question 2

List the secondary sensory nucleus and ascending lemniscus for the somatosensory epicritic pathway. What does this pathway detect (sensations)?

Answer 2

secondary sensory nucleus: nuclei cracilis and cuneatus
ascending lemniscus: medial lemniscus
detects: fine touch, vibration, proprioception

Question 3

List the secondary sensory nucleus and ascending lemniscus for the taste modality.

Answer 3

secondary nucleus: nucleus solitarius

ascending lemniscus: solitario-thalamic tract

Question 4

List the secondary sensory nucleus and ascending lemniscus for the facial sensory protopathic modality. What does this pathway detect (sensations)?

Answer 4

secondary nucleus: descending nucleus of CN V
ascending lemniscus is the trigeminal lemniscus
protopathic: pain, non-fine touch, temperature, itch, tickle

Question 5

List the secondary sensory nucleus and ascending lemniscus for the facial sensory epicritic modality. What does this pathway detect (sensations)?

Answer 5

secondary nucleus: main sensory nucleus of CN V
ascending lemniscus: trigeminal lemniscus
detects: vibration, proprioception, fine touch,

Question 6

List the secondary sensory nucleus and ascending lemniscus for the auditory modality.

Answer 6

secondary sensory nucleus: dorsal and ventral cochlear nuclei; accessory auditory nuclei
ascending lemniscus is the lateral lemniscus

Question 7

List the secondary sensory nucleus for the vestibular modality.

Answer 7

superior, inferior, laterla, and medial vestibular nuclei.

Question 8

List the last sensory modality.

Answer 8

superior and inferior colliculi.

Question 9

What are the parasympathetic preganglionic nuclei?

Answer 9

Edinger-Westphal (III), superior (CN V) and inferior salivatory nuclei (CN IX) nuclei, dorsal motor nucleus of CNX

Question 10

What are the four medullary autonomic centers?

Answer 10

respiratory center, pressor center, depressor center, emesis center

Question 11

3 categories of autonomic components in the brain stem?

Answer 11

1. parasympathetic preganglionic nuclei
2. medullary autonomic centers
3. descending autonomic pathways from the hypothalamus and limbic systems.

Question 12

What are the 3 connections between the cerebellum and the brainstem?

Answer 12

1. superior cerebellar peduncle. connects midbrain with the cerebellum
2. middle cerebellar peduncle: pons with the cerebellum
3. inferior cerebellar peduncle: medulla with the cerebellum

Question 13

What happens if you get a lesion to one of the peduncles or to the cerebellum?

Answer 13

ataxia: decomponsition of movement with a course action tremor.

Question 14

What are the jobs of the reticular formation?

Answer 14

1. retain consciousness
2. maintaing general muscle tone and posture
3. process noxious stimuli
4. regulate major visceral functions

Question 15

What are the two divisions of the reticular formation, and what roles do they play?

Answer 15

medial and lateral portions. Medial has motor function, lateral has sensory function. automonicfunction is found throughout.

Question 16

What do the motor components of the reticular formation do? Which tracts do they use? What part of the reticular formation?

Answer 16

maintain muscle tone and posture via pontine (extensor bias) and medullary (flexor bias) reticulospinal tracts
medial reticular formation.

Question 17

What do the sensory components of the reticular system do? What part of of the reticular formation?

Answer 17

slow pain via the spinoreticular tract
maintenence of consciousness via the reticular activating system that awakens the cortex, esp. in response to noxious stimuli

Question 18

What do the autonomic components of the reticular system do?

Answer 18

Medullary centers: bp, respirations, cardiac function, GI function