Muscles of the Neck (Anterior/Posterior) Flashcards
Infrahyoid Mm (Actions)
Depress hyoid
Depress & elevate thyroid cartilage
Digastricus (Actions)
Depress & Retracts mandible
I/O elevates hyoid
Other Suprahyoid Mm - Stylohyoid, Mylohyoid, Geniohyoid (Actions)
Elevate & Retract hyoid
Protract hyoid
Longus Colli (Actions)
Flex & rotate head/neck
Longus Colli (Nerve)
Ventral rami of spinal Nn
Longus Capitis (Actions)
Flex & rotate head/neck
Longus Capitis (Nerve)
Ventral rami of spinal Nn
Platysma (Actions)
Tenses skin of neck
Depresses angle of mouth
Depresses mandible
Platysma (Nerve)
Facial N V2
Levator Scapulae (Origin and Insertion)
O: transverse processes of cervical vertebrae 1-4
I: Sup angle of scapula
Levator Scapulae (Actions)
Elevates scapula
Rotates scapula downward
Lat flexes neck
Levator Scapulae (Nerve)
Dorsal scapular N
Scalenus Anterior (Actions)
Flexes, Lat flexes, & rotates neck
I/O expands ribrage
Scalenus Anterior (Nerve)
Cervical plexus
Scalenus Medius & Posterior (Actions)
Flexes, Lat flexes, & rotates neck
I/O expands ribcage
Scalenus Medius & Posterior (Nerve)
Cervical plexus
Sternocleidomastoid (Actions)
Flexes, lat flexes, & rotates neck
I/O expands ribcage
Sternocleidomastoid (Nerve)
Spinal Accessory N XI
Splenius Capitis (Actions)
Extends, rotates, & laterally flexes head/neck
Splenius Capitis (Nerve)
Dorsal rami of spinal Nn
Rectus Minor (Actions)
Extend & rotate head
Rectus Minor (Nerve)
suboccipital N
Rectus Major (Actions)
Extend & rotate head
Rectus Major (Nerve)
Suboccipital N
Superior Oblique (Actions)
Extend & rotate head
Superior Oblique (Nerve)
Suboccipital N
Inferior Oblique (Actions)
Extend & rotate head
Inferior Oblique (Nerve)
Suboccipital N
