Anatomy and Physiology

Cranial Nerves

100

XII

Hypoglossal

200

V

Trigeminal

300

X and what two nerve pathways

Vagus

400

IX

Glossopharyngeal

500

VII

Facial

Afferent Innervation

100

Face, anterior 2/3 of tongue (taste)

Facial (VII)

200

soft palate, pharynx, larynx, mucosa of vallecula, esophagus, trachea

Vagus (X)

300

muscles of mastication, Anterior 2/3 tongue (general)

Trigeminal (V)

400

Posterior 1/3 tongue general and special (taste)

Glossopharyngeal (IX)

Efferent Innervation

100

All intrinsic and extrinsic muscles of tongue (except palatoglossus)

Hypoglossal (XII)

200

Obicularis Oris, Buccinator, stylohyoid, posterior belly of digastric

Facial (VII)

300

stylopharyngeus

Glossopharyngeal (IX)

400

Temporalis, Masseter, Anterior Belly Digastric, Mylohyoid, Tensor Veli Palatini, Lateral and Medial Ptyergoids

Trigeminal (V)

500

Levator Veli Palatini, Palatoglossus, Palatopharyngeus, Cricopharyngues, intrinsic laryngeal muscles, esophagus, pharynx

Vagus (X)

Muscles of Speech/Swallow

100

Intrinsic Muscles of tongue

Superior longitudinal muscle, inferior longitudinal muscle, transverse muscle, vertical muscle

200

Extrinsic muscles of tongue

genioglossus, styloglossus, hyoglossus, palatoglossus

300

Suprahyoids

mylohyoid, geniohyoid, stylohyoid, anterior and posterior belly of digastric

400

Infrahyoids

thyrohyoid, sternothyroid, omohyoid, sternohyoid

500

Muscles of pharynx

pharyngeal constrictors (superior/middle/inferior)

Pharyngeal longitudinal muscles

Cricopharyngeal muscle

CN location/Swallowing Center location

100

Pons

Trigeminal and Facial

200

Medulla

Glossopharyngeal, Vagus, Hypoglossal

300

Spinal Cord

Ansa Cervicalis

400

General sensory branches of CN's send afferent info here (swallowing center)

Nucleus Tractus Solitarius

500

Motor branches are organized here (swallowing center)

Nucleus Ambiguous