CNIM - ABRET Practice Exam with Correct Solutions Latest Update

CNIM - ABRET Practice Exam with Correct Solutions Latest Update 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 potentialsPeripheral 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 traum