Facial/Trunk Muscles Flashcards

Orbicularis oculi
Facial Nerve
Closes eye

Orbicularis oris
Facial Nerve
closes mouth

Zygomaticus Major
Facial Nerve
smiling

Buccinator
Facial Nerve
compress cheek

Platysma
Facial nerve

Sternocleidomastoid
Spinal Accessory N
Bi: neck flex
Uni: rotation opposite

Temporalis
Trigeminal Nerve
elevate mandible

Masseter
Trigeminal Nerve
elevate mandible

Medial Pterygoid
Trigeminal Nerve
elevate mandible

Lateral Pterygoid
Trigeminal Nerve
depress mandible

External abdominal obliques
*Think hands in pocket
Bi: Trunk flexion
Uni: rot opposite

Internal abdominal obliques
*Think “yo” muscle fibers
Bi: trunk flexion
Uni: rotation same

Transversus abdominis
*Transverse cut fibers
compresses/supports ab wall

Rectus abdominis
Bi: trunk flexion

Quadratus lumborum
Bi: stabilizes trunk
Uni: lateral flexion

Erector spinae
Bi: trunk extension
Uni: lateral flexion

External intercostals
Intercostal N

Internal intercostals
Intercostal N

Innermost intercostals
Intercostal N

Diaphragm
Phrenic N

Intercostals nerves

Phrenic Nerve

Dorsal rami (cutaneous branches)

Palmar aponeurosis

Flexor retinaculum

Extensor retinaculum

Linea Alba

Inguinal ligament

Achilles tendon