The trigeminal nerve, CN V, is the fifth paired cranial nerve. It is also the largest cranial nerve. In this article, we shall look at the anatomical course of the nerve, and the motor, sensory and parasympathetic functions of its terminal branches.he trigeminal nerve, CN V, is the fifth paired cranial nerve. It is also the largest cranial nerve. In this article, we shall look at the anatomical course of the nerve, and the motor, sensory and parasympathetic functions of its terminal branches.
Acquired deafness contrasts to congenital deafness which is present at birth. The distinction between acquired and congenital deafness specifies only the time that the deafness appears. It does not specify whether the cause of the deafness is genetic (inherited). Acquired deafness may or may not be genetic. For example, it may be a manifestation of a delayed-onset form of genetic deafness.
congenital. existing at, and usually before, birth; referring to conditions that are present at birth, regardless of their causation. Cf. hereditary. congenital heart defect a structural defect of the heart or great vessels or both, present at birth.Any number of defects may occur, singly or in combination.They result from improper development of the heart and blood vessels during the prenatal period.xisting at, and usually before, birth; referring to conditions that are present at birth, regardless of their causation. Cf. hereditary. congenital heart defect a structural defect of the heart or great vessels or both, present at birth.