MCA supply of the cerebral cortex - Accurate Answer✅✅Hand + face/mouth/auditory
Cranial nerves - Accurate Answer✅✅-12 pairs (Mixed fibers: sensory/motor/both).
-Emerge @ irregular intervals from the brain.
-Nuclei displacement:
Motor = medial Sensory = lateral
Meckle's Cave - Accurate Answer✅✅Depression in the medial middle fossa where CN V
ganglion sits
,Low frequency sounds - Accurate Answer✅✅@ apex of cochlea
Area of spine w/ small pedicles, long spinous process, large inter-vertebral foramen - Accurate
Answer✅✅Thoracic
Neuroforamen - Accurate Answer✅✅Opening w/in the spinal canal for nerve roots to enter the
SC
Firm outer layer of the disc - Accurate Answer✅✅Annulus fibrosis
Syrinx - Accurate Answer✅✅Fluid-filled cavity @ center of the SC
Spinal cord ends @ the level btwn: - Accurate Answer✅✅L1-L2 vertebrae (Conus Medullaris)
Blood supply to the SC consists of: - Accurate Answer✅✅1 ASA for both MEP tracts
Hydrostatic pressure - Accurate Answer✅✅Depends on body position
Structural functional anatomy may be altered by: - Accurate Answer✅✅Previous lesions,
current, plasticity, pressure
Glia cell - Accurate Answer✅✅Comes from the Greek word "glue"
Large diameter nerve fiber (vs. small diameter) - Accurate 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 - Accurate
Answer✅✅Cortical potentials
Peripheral nerve sensitivity - Accurate Answer✅✅Least sensitive to injury (more sensitive = SC
grey/white mater, cortical grey matter)
Cavernous angiomas - Accurate Answer✅✅Multi-lobulated lesions containing hemorrhage
Geriatric population: prevalence of temporal bone hyperostosis - Accurate Answer✅✅10-15%
Presbycusis - Accurate Answer✅✅High freq hearing loss; gradually occurs in older individuals
Most commonly injured CN - Accurate Answer✅✅Facial nerve (VII)
Burst fracture - Accurate Answer✅✅-Break in the vertebra
-Failure of anterior & middle vertebral columns
-Caused by violent compressive event (fall, MVA)
Excessive neck flexion in sitting position - Accurate Answer✅✅Quadraparesis (due to ischemia
in upper T-spine)
Lhermittes Sign - Accurate Answer✅✅Shocking sensation that occurs throughout the body
during neck flexion
Central Cord Syndrome (CCS) - Accurate Answer✅✅-Sacral sparing
-Loss of sensory/motor fx @ level of injury
-Disruption of grey matter
(+) Babinski Sign could indicate - Accurate Answer✅✅-severe [UMN] SC trauma
-abnml PTN SSEPs
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