Temporal
bone than through the icicles, a conductive hearing deficit is present. The
Weber test also uses a tuning fork to differentiate between conductive versus
sensorineural hearing loss. In this test, the tuning fork is placed at the top
of the skull, and the sound of the tuning fork reaches both inner ears by
travelling through bone. In a healthy patient, Neuro XR sound would appear
equally loud in both ears. With unilateral conductive hearing loss, however,
the tuning fork sounds louder in the ear with hearing loss. This is because the
sound of the tuning fork has to compete with background noise coming from the
outer ear, but in conductive hearing loss, the background noise is blocked in
the damaged ear, allowing the tuning fork to sound relatively louder in that
ear. With unilateral sensor neural hearing loss, however, damage to the cochlea
or associated nervous tissue means that the tuning fork sounds quieter in that
ear. The trigeminal system of the head and neck is the equivalent of the
ascending spinal cord systems of the dorsal column and the spin thalamic
pathways. Somatosensation of the face is conveyed along the nerve to enter the
brain stem at the level of the puns. Synapses of those axons, however, are.
http://www.fitnessbites.org/neuro-xr
