Neuro lab final secondary Q's Flashcards Preview

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Flashcards in Neuro lab final secondary Q's Deck (46):
1

First synapse for fine touch/vibrotactile and conscious proprioceptive info for lower extremeties.

nucleus Gracilis

2

Afferent fibers are fasciculus gracilis. Efferent fibers are medila lemniscus.

nucleus Gracilis

3

First synapse for fine touch/vibrotactile and conscious proprioceptive info for upper extremeties.

nucleus cuneatus

4

Afferent fibers are fasciculus cuneatus. Efferent fibers are medila lemniscus

nucleus cuneatus

5

First synapse for unconscious proprioceptive info for upper half of body.

accessory cuneate

6

Afferent info through cuneocerebellar tract.

accessory cuneate

7

First synapse for temp., pain and light touch of the face.

Spinal Trigeminal Nucleus:

Receives fibers from CN V, VII, IX and X in relation to somatosensory input from the ear

Part of ventral trigeminothalamic tract.

8

Involved with trigeminal neuralgia.

Spinal Trigeminal Nucleus:

9

Rostral portion receives afferent gustatory (taste) input.Major cranial nerves with axons that synapse here: VII, IX, X

nucleus solitary tract

10

Loose collection of nuclei through all levels of brainstem.

reticular formation

11

Responsible for “integrative” functions, including motor control, autonomic output, and regulation of behavioral state (eg. sleep and wake)

reticular formation

12

Descending fibers of voluntary motor control from the cortex and projecting to spinal cord (corticospinal tract). At the level of the medulla, 80 % will decussate.

pyramid

13

Ascending, 2nd order sensory fibers carrying fine touch/vibrotactile and conscious proprioceptive info to the VPL of the thalamus from the posterior/dorsal columns.

medial lemniscus

14

Ascending temp, pain and light touch pathway. Contralateral info at level of medulla. Input through Lissauer’s fasciulus. Project to the VPL of the thalamus. CVA in the thalamus that disrupts this tract can result in “thalamic pain”.

spinothalamic (ant/ lat)

15

Ascending temp, pain and light touch pathway.

spinothalamic (ant/ lat)

16

Bundle of ascending, decussating, 2nd order sensory fibers carrying fine touch/vibrotactile and conscious proprioceptive info to the VPL of the thalamus from the posterior/dorsal columns. Decussation occurs after synapse at Nucleus Gracilis/Nucleus Cuneatus

internal arcuate decussation

17

First synapse for temp., pain and light touch of the face.

Spinal Trigeminal Nucleus

18

First synapse for temp., pain and light touch of the face. Receives fibers from CN V, VII, IX and X in relation to somatosensory input from the ear. Part of ventral trigeminothalamic tract. Involved with trigeminal neuralgia.

Spinal Trigeminal Nucleus

19

First synapse of afferent vestibular info from Scarpa’s ganglia, and sometimes a collection of primary sensory afferent cell bodies from inner ear.

Vestibular Nuclei

20

Projects to both cerebellum via the vestibulocerebellar pathway and the oculomotor muscles via the MLF. Also sends descending projections to the spinal cord to regulate motor control of the trunk and extensor muscles via the vestibulospinal tract.

Vestibular Nuclei

21

descending projections to the spinal cord to regulate motor control of the trunk and extensor muscles via the vestibulospinal tract

Vestibular Nuclei

22

Large nucleus in the medulla that sends contralateral projections to the cerebellum via the olivocerebellar tract

Inferior Olivary Nucleus

23

Fibers terminate as “climbing fibers” on purkinje cells. Also receives cerebellar output info. Involved in learning unconscious motor tasks .

Inferior Olivary Nucleus

24

Brainstem lower motor neuron pool containing axons that innervate muscles of the larynx and pharynx. Part of CN IX, X, XI

Nucleus Ambiguus

25

Major motor nucleus containing lower motor axons that innervate muscles of the ipsilateral tongue. Part of CN XII

Hypoglossal Nucleus

26

Major preganglionic, parasympathetic motor nucleus of CN X. Innervates the lungs, heart, stomach and GI tract.

dorsal Motor Nucleus of X

27

connecting the cerebellum to the brainstem. Most unconscious proprioceptive input enters the cerebellum through this bundle

Inferior Cerebellar Peduncle

28

Most unconscious proprioceptive input enters the cerebellum through this bundle (cuneocerebellar, dorsal spinocerbellar, rostral spinocerbellar, vestibulocerebellar, olivocerebellar, trigeminal cerebellar). Also contains cerebellar efferent axons to the vestibular nuclei.

Inferior Cerebellar Peduncle

29

Mixed (both ascending and descending) fiber tract that connects the vestibular nuclei with CN III, IV and VI along with head, neck and trunk muscles to regulate vestibulo-occular reflexes and coordination.

Medial Longitudnal Fasciculus:

30

Space in ventral hindbrain containing CSF to cushion brain and provide nutrients. Contains choroid plexus.

IV Ventricle

31

Major CNS center of norepinephrine production,

Locus Ceruleus

32

Major CNS center of norepinephrine production, located in the pons, projecting all throughout the brain. Part of the ascending reticular activating system. Involved in arousal and alertness.

Locus Ceruleus

33

connecting the cerebellum to the brainstem. Most cerebellar efferent’s exit the cerebellum through this tract.

Superior Cerebellar Peduncle

34

The ventral spinocerebellar tract enters the cerebellum through this peduncle.

Superior Cerebellar Peduncle

35

connecting the cerebellum to the brainstem. Cortical input to the cerebellum synapses on the ispilateral pontine nuclei and then decussates to enter the cerebellum via this peduncle (cortico-ponto-cerbellar).

Middle Cerebellar Peduncle

36

Information through this peduncle pathway involves coordinating movements

Middle Cerebellar Peduncle

37

Dorsal portion of the pons that contains reticular formation and cranial nerve nuclei (both sensory and motor). Comprises the floor of the IV Ventricle.

Pontine Tegmentum

38

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

Basis Pontis

39

Part of the midbrain tectum (roof) that is involved in eye tracking and saccades.

Superior Colliculus

40

Part of basal ganglia circuit involving substantia nigra pars reticulata. Receives afferent input from frontal eye fields and visual association cortices and sends motor output to oculmotor nuclei and to the head and neck via the tectospinal tract

Superior Colliculus

41

Lower motor neuron nucleus of CN III. Innervates the medial rectus, inferior oblique, inferior rectus, superior rectus, and levator palpebrae.

Oculomotor Nucleus

42

Parasympathetic, preganglionic nucleus of CN III. Regulates pupillary light response through projections to the ciliary ganglion (post-ganglionic neurons innervate the sphincter pupillae). Also responsible for accommodation reflex.

Nucleus of Edinger-Westphal

43

Major midbrain site containing two portions: a pars compacta (containing dopaminergic neurons that project to the striatum) and a pars reticulata (containing neurons involved in saccades and visual tracking).

Substantia Nigra

44

Large midbrain nucleus receiving cerebellar info. Sends descending fibers down to the rostral spinal cord via the rubrospinal tract (an extrapyramidal tract), which may be important for upper-body flexor muscle control). Also has bi-directional communication with the reticular formation.

Red Nucleus

45

Descending fibers of voluntary motor control from the cortex and projecting to spinal cord (corticospinal and corticobulbar tracts). At the level of the midbrain, cortical input is ispilateral.

Crus Cerebri

46

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

Periaqueductal Grey