Spinal cord Flashcards

1
Q

Which system tactile discrimination, Vibration, Pressure, proprioception

A

Dorsal Column/Medial Lemniscus system

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2
Q

Which tract discriminative pain and temperature

A

Lateral Spinothalamic

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3
Q

System controls fine movements or voluntary skilled motor activity innervation of voluntary muscles

A

Corticospinal System

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4
Q

Most common cause of spinal cord lesions

A

Trauma to the Spinal cord, complete or partial

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5
Q

Complete Spinal Cord injury

A

absence of sensory and motor function BELOW the lesion level

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6
Q

Incomplete

A

Partial loss of sensory and motor function BELOW the lesion. Most frequent than complete

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7
Q

Bilateral loss of tactile discrimination, vibration, pressure, proprioception, accompanied by ataxia
Pts with neurosyphilis

A

Dorsal column syndrome: bilateral loss of dorsal column. Pts with neurosyphilis

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8
Q

Ipsilateral loss of lateral corticospinal; and Ipsilateral loss of Dorsal column. Contralateral loss of spinothalamic tract

A

Brown-Sequard Syndrome
caused by MS, Stab wound, Tumor
Lateral cord lost

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9
Q

Dorsal column spared, BL loss of lateral corticospinal tracts, loss of ventral horn, loss of spinothalamic tracts

A

Anterior cord Syndrome
Infarct, ischemia trauma
2/3 of anterior cord lost

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10
Q

Loss of spinothalamic tracts; small lesion, 1st symptom tract across midline. BL loss of pain and temp
Loss of ventral Horn large lesion; flaccidity of upper limb
Etiology infarct ischemia trauma

A

Central Cord syndrome

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11
Q

rare, progressive congenital disorder; fluid filled cavity in Spinal cord

A

Central Cord syndrome

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12
Q

Degeneration of SC from severe vit B12 deficiency, pernicious anemia, AIDS Bilateral ataxia, bilateral spastic paralysis, bilateral loss of discriminative touch, pressure, vibration and proprioception

A

Posterolateral Cord Syndrome

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13
Q

Acute viral disease (poliomyelitis) causes bilateral flaccidity in muscles innervated by the affected SC levels

A

Ventral Anterior Horn syndrome

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14
Q

Area most vulnerable injury after impact accidents and most severe physiological effects

A

Acute spinal cord injury

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15
Q

Major cause of morbidity and mortality. Cervical and upper thoracic SCI, alveolar hypoventilation and inability to clear bronchial secretions

A

Acute SCI

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16
Q

Initially causes flaccid paralysis with loss of sensation below the level of injury, reduced vital capacity and arterial hypoxemia

A

Acute SCI

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17
Q

SC functions below the lesion are depressed or lost immediately after traumatic injury to SC
Lasts 1-3 wks

A

Spinal SHock

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18
Q

Lost or impaired; somatic and autonomic reflexes, autonomic regulation of BP, control of sweating and piloerection (erection of haris)

A

Spinal shock

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19
Q

Spinal condition causes the following constant threats; aspiration of gastric contents, pneumonia, and pulmonary embolism

A

Spinal Shock

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20
Q

Treatment of acute SCI; cervical fracture or dislocation

A

Halo thoracic device is more effective than neck collars

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21
Q

Method of intubating cervical fracture or dislocation

A

direct laryngoscopy with manual in line stabilization or awake ficeroptic laryngoscopy

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22
Q

In acute SCI; spinal fractures or dislocations what should be be avoided

A

Hypotension

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23
Q

Which neuromuscular muscle relaxant should be used in acute SCI

A

Nondepolarizing (Pancurium), Succycholine may be used (not in chronic SCI)

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24
Q

Medications used for chronic SCI

A

antidepressants, analgesics and baclofen for involuntary muscle spasms

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25
Q

Spinal cord injury above with vertebra causes apnea

A

C5

26
Q

Prevention of what condition in chronic SCI

A

Autonomic hyperreflexia

27
Q

Which muscle relaxants could be used for chronic SCI

A

Nondepolarizing, do not use succylcholine (cause hyperkalemia)

28
Q

EXAM question: What inititates Autonomic Hyperreflexia

A

surgery or visceral stimulation below the level of spinal cord injury

29
Q

Patient with SCI at level T1 is being surgically interviened in the bladder and rectum, notice increase in BP and decrease in pulse, What condition is possible

A

Autonomic Hyperreflexia

30
Q

Symptoms of autonomic hyperreflexia

A

Hypertension, bradycardia are hallmark, LOC, seizures, cardiac dysrhythmias, pulmonary edema

31
Q

Which anesthesia should be given for autonomic hyperreflexia

A

Spinal or general; prevents AH. Topical or epidural anesthesia are not effective in prevention

32
Q

Can Autonomic hyperrflexia manifest post op

A

Yes, after anesthetic drugs ware off

33
Q

Most common effect of intervertebral disk disease

A

Low back pain

34
Q

Cervical Disk disease usually occurs are which intravertebral spaces?

A

C5-C6 or C6-C7

35
Q

Treatment for cervical disk disease

A

Surgical decompression

36
Q

Most common sites of lumbar disk disease

A

L4-L5, L5-S1

37
Q

Treatment for lumbar disk disease

A

analgesia, muscle relaxants, epidural steroids, surgical laminectomy and microdisectomy

38
Q

Cervical Plexus

A

C1-C4

39
Q

Brachial Plexus

A

C5-T1, phrenic nerve C3-C5

40
Q

Phrenic nerve

A

C3-C5

41
Q

Lumbosacral Plexus

A

L1-S5

42
Q

Bells Palsy causes

A

Ipislateral motor weakness all muscles innervated by VII (7)

43
Q

Which CN is affected in BeLLs Palsy

A

CN VII, causes inflammation and edema of CN VII

44
Q

What is affected in Bells Palsy? Cranial or Motor nerves?

A

Motor are affected, sensations are not

45
Q

Virus implicated in Bells Palsy (5)

A

Herpes simplex 1, mumps, Epstein Barr, cytomegalovirus, rubella

46
Q

More common in what pts Bells Palsy?

A

DM, (4x) Immunocompression (Aids), and 3rd trimerster of pregnancy

47
Q

Tx of Bells Palsy

A

Prednisone, cover eye if not blinking. Sever cases: Surgical decompression

48
Q

Trigeminal Neuralgia is

A

sudden unilateral facial, stabbing pain

49
Q

Which nerve is affected in trigeminal neuralgia

A

CN V, trigeminal

50
Q

Tx of trigeminal neuroalgia

A

Antiepileptic meds; carbamazepine,

51
Q

Exam question; what may happen when surgical treatment of CN V in trigeminal neuralgia

A

Bradycardia due to trigeminocardiac reflex

52
Q

Tx for Trigeminal Neuralgia of placement of retractor to access CN V may cause

A

Hearing loss; stretches CN VIII

53
Q

Glossopharyngeal Neuralgia causes

A

Episodes of intense pain in throat, neck, tongue and ear triggered by talking, chewing, swallowing and coughing

54
Q

Glossopharyngeal Neuralgia causes

A

Bradycardia and syncope, Hypotension , seizures and cardiac arrest

55
Q

Tx of glossopharyngeal Neurolgia

A

acute cardio symptoms; atropine, isoproterenosl, cardiac pacemaker or combo of above. anticonvulsant drugs, carbamazepine, phenytoin. Intracranial surgical transection of CN IX and CN V

56
Q

In glossopharyngeal neuralgia, pt with bradycardia, what should be placed if episodes of bradycadia and syncope

A

transcutaneous cardiac pacing, placement of tranvenous cardiac pacemaker before induction of anesthesia

57
Q

What is likely during manipulation of CN X

A

Bradycardia and hypertension, premature V

58
Q

What to use post op to control HTN after Glossopharyngeal neuralgia

A

Hydralazine

59
Q

What neuromuscular blocker should be avoided with Charcot Marie Tooth disease

A

Succycholine; also avoid in chronic SCI

60
Q

What may happen post op in Charcto Marie Tooth Disease

A

Resp failure, resulting from weakness of resp muscles focus on response fo neuromuscular blocking drugs

61
Q

Guillain Barre syndrome causes what in the face, head

A

Difficulty swallowing and impaired ventilation

62
Q

Reasons of mortality in Guillain Barrre syndrome

A

sepsis, acute resp failure, pulmonary embolism or caridac arrest