Definition of COUNTERBORE. : to form a counterbore in: enlarge (part of a hole) by means of a counterbore.ADVERTISEMENT.efinition of COUNTERBORE. 1. : a flat-bottomed enlargement of the mouth of a cylindrical bore. 2. : a drill for making a counterbore â compare countersink.
The vestibulocochlear nerve (auditory vestibular nerve) , known as the eighth cranial nerve, transmits sound and equilibrium (balance) information from the inner ear to the brain.
The abducens nerve carries motor impulses to the lateral rectus eye muscle which moves the eye laterally causing abduction of the eye. Which cranial nerves carry gustatory (taste) information? CN VII (Facial), CN IX (Glossopharyngeal) and CN X (Vagus). Which cranial nerve is the longest? CN X (Vagus) which reaches from the medulla to the digestive and urinary organs. What two cranial nerves carry sensory information about blood pressure to the brain? CN IX (Glossopharyngeal) and CN X (Vagus). Which cranial nerve is responsible for pupillary constriction? CN III (Oculomotor).