Question

Give the name and type of I, IV and VII cranial nerves.

Hint:

A mnemonic to remember the nerve types (Sensory, Motor, or Both): "\textbf{S}ome \textbf{S}ay \textbf{M}arry \textbf{M}oney, \textbf{B}ut \textbf{M}y \textbf{B}rother \textbf{S}ays \textbf{B}ig \textbf{B}rains \textbf{M}atter \textbf{M}ore." The type for nerve I is the 1st word (Some=Sensory), IV is the 4th (Money=Motor), and VII is the 7th (Brother=Both).

Answer 1

The cranial nerves are a set of 12 paired nerves that emerge directly from the brain. The name and type of the requested nerves are:

Cranial Nerve I:

Name: Olfactory Nerve
Type: Sensory (Specifically, special visceral sensory). It is responsible for the sense of smell.

Cranial Nerve IV:

Name: Trochlear Nerve
Type: Motor (Somatic motor). It controls a single extrinsic eye muscle, the superior oblique, which helps in eye movement.

Cranial Nerve VII:

Name: Facial Nerve
Type: Mixed (both Sensory and Motor).

Its motor functions include controlling the muscles of facial expression.
Its sensory functions include carrying taste sensations from the anterior two-thirds of the tongue.
It also has parasympathetic motor functions to stimulate salivary and lacrimal (tear) glands.