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CNIM - ABRET Practice Exam Questions With 100% Correct Answers Cavities inside the skull - Answer Anterior/middle/posterior fossa $11.99   Add to cart

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CNIM - ABRET Practice Exam Questions With 100% Correct Answers Cavities inside the skull - Answer Anterior/middle/posterior fossa

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CNIM - ABRET Practice Exam Questions With 100% Correct Answers Cavities inside the skull - Answer Anterior/middle/posterior fossa Cranial bones - Answer Frontal, occipital, sphenoid, ethmoid (unpaired). Parietal & temporal (paired). Mental protuberance - Answer chin bone MCA supply of the ...

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  • January 21, 2024
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CNIM - ABRET Practice Exam
Questions With 100% Correct Answers
Cavities inside the skull - Answer Anterior/middle/posterior fossa

Cranial bones - Answer Frontal, occipital, sphenoid, ethmoid (unpaired). Parietal &
temporal (paired).

Mental protuberance - Answer chin bone

MCA supply of the cerebral cortex - Answer Hand + face/mouth/auditory

Cranial nerves - Answer -12 pairs (Mixed fibers: sensory/motor/both).
-Emerge @ irregular intervals from the brain.
-Nuclei displacement:
Motor = medial Sensory = lateral

Meckle's Cave - Answer Depression in the medial middle fossa where CN V ganglion
sits

Low frequency sounds - Answer @ apex of cochlea

Area of spine w/ small pedicles, long spinous process, large inter-vertebral foramen -
Answer Thoracic

Neuroforamen - Answer Opening w/in the spinal canal for nerve roots to enter the
SC

Firm outer layer of the disc - Answer Annulus fibrosis

Syrinx - Answer Fluid-filled cavity @ center of the SC

Spinal cord ends @ the level btwn: - Answer L1-L2 vertebrae (Conus Medullaris)

Blood supply to the SC consists of: - Answer 1 ASA for both MEP tracts

Hydrostatic pressure - Answer Depends on body position

Structural functional anatomy may be altered by: - Answer Previous lesions, current,
plasticity, pressure

Glia cell - Answer Comes from the Greek word "glue"

Large diameter nerve fiber (vs. small diameter) - Answer -Recruited 1st w/ INC'd stim
intensity
-Higher conduction velocity
-More vulnerable to hypoxia & pressure Δ's

,Synaptic transmission, and/or Δ's in thalamocortical projections, produce - Answer
Cortical potentials

Peripheral nerve sensitivity - Answer Least sensitive to injury (more sensitive = SC
grey/white mater, cortical grey matter)

Cavernous angiomas - Answer Multi-lobulated lesions containing hemorrhage

Geriatric population: prevalence of temporal bone hyperostosis - Answer 10-15%

Presbycusis - Answer High freq hearing loss; gradually occurs in older individuals

Most commonly injured CN - Answer Facial nerve (VII)

Burst fracture - Answer -Break in the vertebra
-Failure of anterior & middle vertebral columns
-Caused by violent compressive event (fall, MVA)

Excessive neck flexion in sitting position - Answer Quadraparesis (due to ischemia in
upper T-spine)

Lhermittes Sign - Answer Shocking sensation that occurs throughout the body during
neck flexion

Central Cord Syndrome (CCS) - Answer -Sacral sparing
-Loss of sensory/motor fx @ level of injury
-Disruption of grey matter

(+) Babinski Sign could indicate - Answer -severe [UMN] SC trauma
-abnml PTN SSEPs

Hoffman's Reflex (1918) - Answer Palmar flexion of the thumb when the distal
phalanx of the middle finger (of the same hand) is rapidly stroked

A nml curve of the lumbar spine taking place @ 1-2 y/o - Answer Kyphosis

Scoliosis progression in peds - Answer More likely in girls > boys

Apraxia - Answer Difficulty w/ skilled mvmnts

Neurapraxia - Answer PNS disorder: blockage of sensory + motor nerve conduction
(w/o axonal damage)

INC venous pressure leads to - Answer -venous congestion; DEC drainage of nml
veins; chronic hypoxia
-NOT hypotension

common source of air embolism introduction into the blood supply - Answer Superior
sagittal sinus

, MAC is approximated by the effect of anesthesia on - Answer H-reflex (mvmnt when
stimulated)

Sevo/Des/N2O - Answer DO NOT act on the same neuronal receptors

On an equi-MAC basis (w/ equivalent doses of anes), which has the greatest effect
on MEPs of recorded mm's? - Answer N2O

N2O - Answer -synergistic IONM effects when mixed w/ Iso --> depressed IONM
-weak anesthetic agent
-causes ~75% DEC in SSEP amplitudes

Desflurane - Answer -affects NMJ --> enhances effect of NMBs
-no effect on MEP CMAPs
-eliminates most rapidly

Isoflurane 1.7% - Answer may result in burst suppression

TIVA MoA on pt mvmnt - Answer Glycine receptor blocking in the SC

Which is not a major MoA of the usual anesthetic agents that affect IONM? - Answer
Inhibition of nerve conduction velocity

EP modality most affected by propofol - Answer Mid-latency auditory response

Ketamine - Answer (NMDA antagonist)
-does NOT act @ GABA synapse
-desirable for peds <6-10 y/o + TCeMEP monitoring
-agent that least depresses SSEPs
-SSEP/MEP = INC amp
-EEG = INC beta

Propofol - Answer (GABA agonist)
-SSEP/BAER = INC latency
-EEG = slowing

Etomidate - Answer (GABA agonist)
-SSEP/MEP: INC amp
-EEG: slowing

dexmeditomidine (Precedex) - Answer (α2-adrenergic antagonist)
-mimics nml sleep; awakening --> most nml neuro exam
-associated w/ unconsciousness (NOT amnesia)
-DEC MEP ampmlitudes

Fentanyl - Answer (μ-opioid agonist)
-SSEP: mild effect on lat/amp
-EEG: slowing, diffuse Δ
-high dose maintenance --> may not result in EEG burst depression

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