Peripheral Nerve Supply of Head, Neck and Trunk

Innervation of diaphragm

Phrenic nerves, formed by ventral rami of spinal nerves c345

Innervation of intercostals and subcostals

Intercostal nerves, continuations of ventral rami of thoracic spinal nerves

Innervation of levator costarum

Dorsal rami of thoracic spinal nerves, muscles found posteriorly

Innervation of rectus abdominis, obliques and transversus abdominis

Thoracoabdominal nerves, continuations of lower intercostal nerves

Innervation of pyramidalis

Subcostal nerve

Innervation of quadratus lumborum

Subcostal nerve, ventral rami of spinal nerves l1-3/4

Innervation of psoas major

Ventral ramus of spinal nerve l1

Innervation of psoas minor

Ventral ramus of spinal nerves l1-3

Innervation of iliacus

Femoral nerve

Innervation of serratus posterior superior and inferior

Ventral rami of thoracic spinal nerves

Medial branch of dorsal ramus

Spinalis, transversospinalis group, unisegmental group, zygapophyseal joint

Lateral branch of dorsal rami

Longissimus and iliocostalis

Innervation of sternocleidomastoid

Accessory nerve CN XI

Innervation of longus capitis and longus colli

Ventral rami of cervical spinal nerves

Innervation of splenius capitis and splenius cervicis

Dorsal rami of cervical spinal nerves

Innervation of levator scapulae

Dorsal scapular nerve

Innervation of trapezius

Accessory nerve CN XI

Innervation of suboccipital muscles

Suboccipital nerve - found in suboccipital triangle

Innervation of scalenes and rectus capitis lateralis

Ventral rami of cervical spinal nerves

Innervation of temporalis, masseter, medial and lateral pterygoid

Mandibular division of trigeminal nerve CN V3

Innervation of muscles of facial expression

Facial nerve CN VII

Innervation of anterior digastric and mylohyoid

Mandibular division of trigeminal nerve CN V3

Innervation of posterior digastric and stylohyoid

Facial nerve CN VII

Innervation of geniohyoid

Ventral ramus of c1 spinal nerve, travels via hypoglossal nerve CN XII

Innervation of thyrohyoid

Ventral ramus of c1 spinal nerve, travels via hypoglossal nerve CN XII

Innervation of sternohyoid, sternothyroid and omohyoid

Cervical plexus, formed by ventral rami of spinal nerves c1234

Sensory innervation of face

Divisions of trigeminal nerve CN V - ophthalmic nerve CN V1, maxillary nerve CN V2, mandibular nerve CN V3

Ophthalmic nerve

Top of skull, forehead area, top half of eyes, front of nose

Maxillary nerve 

Side of forehead, cheeks, sides of nose, top of lip, bottom half of eyes

Mandibular nerve

Side of head, attached half of ear, jaw, bottom of lip, chin

Sensory innervation rest of face and neck

Cervical spinal nerves - ventral rami and dorsal rami

Motor innervation of pharynx 

Constriction muscles, salpingopharyngeus and palatopharyngeus = vagus nerve cn x, stylopharyngeus = glossopharyngeal nerve cn ix

Sensory innervation of pharynx

Primarily glossopharyngeal, some contribution from vagus for laryngopharynx and maxillary cn v2 for nasopharynx

Innervation of larynx

Vagus nerve cn x