muscle functions and innervation Flashcards
Temporalis
Close jaw, flex TMJ, move scalp
Trigeminal n. (3rd branch) CN V3
Masseter
Close jaw, flex TMJ, side-to-side (herbivores)
Trigeminal n., CN V-3
Digastricus
Extend TNJ
Trigeminal CN v3
Hyoglossal
retracts and depresses tongue,
hypoglossal n.
Omotransversarius
moves scapula forward
Accessory n.
Brachiocephalicus
extends shoulder joint
Accessory n.
Trapezius
raises scapula dorsomedially, extends shoulder in motion
Accessory n.
Rhomboideus
raises scapula
Accessory n.
Scalaneus
Ventral flexion of neck (bilaterally), flexes neck laterally (unilateral), Resp accessory muscle - elevates first rib
Accessory n.
Sternocephalicus
ventroflexion, lowers head, flexes neck unilaterally
Accessory n.
Sterno-thyro-hyoideus
retracts tongue and larynx, lowers head
Segmental cervical nn.
Serratus ventralis
supports weight of trunk, holds scapula to trunk, moves scapula to & away from neck
Long thoracic n.
Supraspinatus
Stabilizes shoulder joint, extends shoulder joint
Suprascapular n.
Infraspinatus
Stabilizes shoulder joint
Suprascapular n.
Subscapularis
Stabilized shoulder joint, adducts foreleg
Subscapular n.
Deltoidius
Flexes shoulder joint
Axillary n.
Teres major/minor
flexes shoulder joint
Axillary n.
Biceps brachii
flexes elbow
Musculocutaneous n.
Brachialis
flexes elbow,
Musculocutaneous n.
Triceps
extends elbow joint, long head extends shoulder joint
Radial n.
Extensor carpi radialis
extends carpal joint
Radial n.
Common digital extensor (thoracic limb)
extends carpal joint and distal phalanges
Radial n.