CNIM - ABRET Practice Exam Questions

ET Practice Exam Questions Cavities inside the skull - Anterior/middle/posterior fossa Cranial bones - Frontal, occipital, sphenoid, ethmoid (unpaired). Parietal & temporal (paired). Mental protuberance - chin bone MCA supply of the cerebral cortex - Hand + face/mouth/auditory Cranial nerves - -12 pairs (Mixed fibers: sensory/motor/both). -Emerge @ irregular intervals from the brain. -Nuclei displacement: Motor = medial Sensory = lateral Meckle's Cave - Depression in the medial middle fossa where CN V ganglion sits Low frequency sounds - @ apex of cochlea Area of spine w/ small pedicles, long spinous process, large inter-vertebral foramen - Thoracic Neuroforamen - Opening w/in the spinal canal for nerve roots to enter the SC Firm outer layer of the disc - Annulus fibrosisSyrinx - Fluid-filled cavity @ center of the SC Spinal cord ends @ the level btwn: - L1-L2 vertebrae (Conus Medullaris) Blood supply to the SC consists of: - 1 ASA for both MEP tracts Hydrostatic pressure - Depends on body position Structural functional anatomy may be altered by: - Previous lesions, current, plasticity, pressure Glia cell - Comes from the Greek word "glue" Large diameter nerve fiber (vs. small diameter) - -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 - Cortical potentials Peripheral nerve sensitivity - Least sensitive to injury (more sensitive = SC grey/white mater, cortical grey matter)