Cranial Nerves II

Flashcards about cranial nerves and facial nerves

Trochlear Nerve (IV)

Sensory: eye; Motor: superior oblique muscle

Abducens Nerve (VI)

Motor: external rectus muscle

Olfactory Nerve (I)

Sensory: nose

Facial Nerve (VII)

Sensory: anterior part of tongue and soft palate; supplies the sublingual gland

Trigeminal Nerve (V)

Sensory: face, membranes, teeth, etc.; innervates the muscles of mastication

Oculomotor Nerve (III)

Motor: all eye muscles except those supplied by IV and VI

Vestibulocochlear (VIII)

Sensory: inner ear

Glossopharyngeal (IX)

Motor: pharyngeal musculature; Sensory: posterior part of tongue, tonsil, pharynx

Vagus (X)

Motor: heart, lungs, bronchi, gastrointestinal tract; Sensory: heart, lung, bronchi, trachea, larynx, pharynx, gastrointestinal tract, external ear

Hypoglossal (XII)

Motor: muscles of the tongue

Accessory (XI)

Motor: sternocleidomastoid and trapezius muscles

Motor neurons of the Facial Nerve (VII)

Innervates muscles of facial expression and other muscles derived from the second pharyngeal arch.

Parasympathetic preganglionic secretomotor axons of the Facial Nerve (VII)

Supply the lacrimal gland, submandibular and sublingual gland, and small salivary glands

Special sensory processes of the Facial Nerve (VII)

Convey taste sensation from taste buds on the anterior two thirds of the tongue

Nucleus of the tractus solitaries

Gustatory nuclei

Location of Motor Nucleus of Facial Nerve

Pons

Location of Nucleus of tractus solitarius

Medulla

Facial nerve damage

Patient suffers complete paralysis of the muscles on the side of the face supplied by the damaged facial nerve

Deep damage to the facial nerve

Lower motor neuron lesion that occurs at any point of peripheral course of the facial nerve

If chorda tympani is involved in facial nerve damage

Impairment of taste and function of lacrimal gland will be interrupted

Supranuclear facial palsy

Caused by upper motor neuron lesion affected by interruption of corticonuclear pathways

Result of Supranuclear facial palsy

Results in paresis of affected muscles