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COM - Neuro Test 3 > Visceral Afferent Pathways - 4/20 Stephens > Flashcards

Visceral Afferent Pathways - 4/20 Stephens Flashcards

1
Q

Where do fibers from the VAN project to in V-S reflex pathways?

A

Alpha and gamma motor neurons

Eventually to interneurons in the intermediate gray fibers in the FP

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2
Q

Where do fibers from the VAN project to in V-V reflex pathways?

A 
Intermediolateral cell column for Sympathetics or
PS nuclei (Dorsal Motor Nucleus or Vagus and Sacral Autonomic Nucleus)
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3
Q

Describe the spinoreticulothalamic pathway:

A

Info from VAN may enter the FP via the NP and bilaterally ascend to the brainstem RF or the Centromedian Nucleus of the hypothalamus

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4
Q

What can relieve phantom limb pain?

A

Neurosurgical transection of the spinothalamic tract

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5
Q

In the brainstem all GVA fibers from what CNS terminate where?

A

7, 9, 10

NTS (Solitary Nucleus)

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6
Q

Fibers from the Solitary nucleus project to the Dorsal Motor Nucleus of what CN?

Sends what kind of fibers to where?

Response?

A

Vagus N.

Pre-Gang PS fibers to larynx, pharynx, thorax, abdomen

Increased secretion

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7
Q

The Solitary-Dorsal Motor Nucleus (X) pathway is important for what responses?

A

Cardiac
GERD
LES

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8
Q

The solitary-nucleus Ambiguus pathway is what kind of response?

Projects info via what?

Innervates what?

What response?

A

V-S

Interneurons of the RF

Muscles of larynx and pharynx

Deglutition and cough

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9
Q

Carotid body reflex stimulus?

Nerve?

Afferent Nucleus?

Efferents Nucleus?

Response?

A

INC CO2

Sinocarotid N. (Vagus)

NTS

Phrenic nucleus

INC ventilation

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10
Q

Carotid sinus reflex stimulus?

Afferent nerve?

Afferent nucleus?

Efferents nucleus?

Response?

A

INC BP

Sinocarotid N.

NTS

Dorsal Motor Nucleus

DEC Cardiac Contraction

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11
Q

Gag reflex stimulus?

Afferent N. And nucleus?

Efferent nucleus?

Efferents nerve?

Response?

A

Touching pharyngeal mucosa

CN 9 and NTS

Nucleus Ambiguus

Pharyngeal branch of CN 10

Gagging

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12
Q

LER stimulus?

Afferent nerve?

Afferent nucleus?

Then where?

Efferent nuclei?

Responses?

A

To laryngeal mucosa

ibSLN (CN 10)

NTS

LRST and LVST

Nucleus Ambiguus and Medial Motor Cell Column

Expiratory cough and airway clearing

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13
Q

During the LER there is an increase in intra-abdominal pressure. What also happens with this increase in pressure?

A

Closure of LES, IUS, EUS, anal sphincter, and inguinal canal

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14
Q

The external sphincter of the bladder is innervated by what kind of fibers?

A

GSE

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15
Q

As the bladder fills with urine what senses this action?

Impulses then go where?

Interneurons then convey info to where?

When does voiding finally occur?

A

Afferent neurons at S2-4

Dorsal root to VAN at S2-4

SAN at S2-4

Efferents fibers stimulate bladder muscles to contract

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16
Q

A reflex bladder is the result of what?

Interrupts what connection?

What is the outcome of this condition?

A

Transection of the spinal cord ABOVE S2

LRST to the SAN

Pt cannot voluntarily void their bladder

17
Q

After _____ the bladder reflex may return without voluntary control, and the patient will have automatic reflex voiding or a reflex bladder

A

Spinal shock

18
Q

What is the cause of an Atonic Bladder?

Result?

Associated with what condition?

A

Lesions of dorsal roots of S2-4 or dorsal funiculi

Flaccid bladder and INC bladder capacity
Voluntary voiding possible, but incomplete

Tabes Dorsalis

19
Q

The ascending gustatory pathway involves what fibers from what CNs?

To what tract and nucleus?

Lemniscus?

Then what nucleus?

What cortex?

A

SVA from CN 7, 9, 10

Solitary tract and nucleus

Ipsilateral ML

VPM Nucleus

Primary gustatory Cortex

20
Q

Slow pain of the head primary neuron located where?

Conveyed by what?

Sensory nucleus?

Conveyed by what?

Thalamic neuron?

A

Trigeminal ganglion

Descending Tract of V

Subnucleus Caudalis

Trigemino-reticular Fibers

Centromedian Hypothalamus

21
Q

Visceral pain of the head primary neuron located where?

Conveyed by what?

Sensory nucleus?

Conveyed by what?

Thalamic neuron?

A

GVA Sensory Ganglia

Solitary Tract

Solitary Nucleus

Solitaro-hypothalamic fibers

Centromedian Hypothalamus

22
Q

Slow pain of the body primary neuron located where?

Conveyed by what?

Sensory nucleus?

Conveyed by what?

Thalamic neuron?

A

Spinal ganglion

DL Fasciculus

NP

FP

Centromedian Hypothalamus

23
Q

Visceral pain of the body primary neuron located where?

Conveyed by what?

Sensory nucleus?

Conveyed by what?

Thalamic neuron?

A

Spinal ganglion

DL Fasciculus

VAN

RF

Centromedian Hypothalamus

24
Q

Where do most visceral reflex fibers enter the spinal cord?

A

Cranial and sacral levels

COM - Neuro Test 3 (17 decks)

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