Innervation Axial Muscles

Pectoralis major

medial and lateral pectoral nerves

Pectoralis minor

medial and lateral pectoral nerves

Trapezius

accessory nerve (XI)

Latissimus dorsi

thoracodorsal nerve

Rhomboid major

dorsal scapular nerve

Rhomboid minor

dorsal scapular nerve

Frontalis

facial nerve (VII)

Temporalis

trigeminal nerve (V)

Masseter

trigeminal nerve (V)

Orbicularis oculi

facial nerve (VII)

Orbicularis oris

facial nerve (VII)

Risorius

facial nerve (VII)

Mentalis

facial nerve (VII)

Buccinator

facial nerve (VII)

Zygomaticus major

facial nerve (VII)

Zygomaticus minor

facial nerve (VII)

Depressor labii inferioris

facial nerve (VII)

Levator labii superioris

facial nerve (VII)

Levator scapulae

spinal nerves C3–5 and posterior scapular nerve

Scalenes

spinal nerves C3–8

Sternocleidomastoid

spinal nerves C2–4 and accessory nerve (XI)

Omohyoid

spinal nerves C1–3

Platysma

facial nerve (VII)

Digastric

trigeminal nerve (V) and facial nerve (VII)

Mylohyoid

trigeminal nerve (V)

Erector spinae

dorsal rami of spinal nerves

External abdominal oblique

intercostal nerves T7–12

Internal abdominal oblique

intercostal nerves T7–12 and spinal nerve L1

Transversus abdominis

intercostal nerves T7–12 and spinal nerve L1

Rectus abdominis

intercostal nerves T6–12

Serratus anterior

long thoracic nerve

Quadratus lumborum

nerves T12 and L1–L4

External intercostals

intercostal nerves

Internal intercostals

intercostal nerves

Diaphragm

phrenic nerv