Fetal Pig Muscles - Origin and Insertion, Action

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teres major (origin and insertion)

(border of) scapula, (greater tuberosity of) humerus

sternohyoid (origin and insertion)

manubrium of sternum, hyoid (bone)

acromiodeltoid (action)

raises the humerus

spinodeltoid (origin and insertion)

spine of scapula, proximal humerus

spinotrapezius (origin and insertion)

(first 10) thoracic vertebrae, scapula

splenius (origin and instertion)

(first two) thoracic vertebrae (and) dorsal midline; occipital bone

digastric (action)

(moves the mandible) chewing

biceps brachii (origin and insertion)

(single tendon over) humerus; coracoid process of (the) scapula, radius and ulna

pectoralis minor (action)

adducts and retracts forelimb

acromiotrapezius (action)

adducts scapula

spinotrapezius (action)

adducts scapula

sternomastoid (origin and insertion)

anterior sternum, mastoid process

brachiocephalic (origin and insertion)

back of neck, mastoid process, back of head; humerus

scalenus medius (action)

bend neck and draw ribs anteriorly

levator scapulae ventralis (origin and insertion)

cervical vertebrae, (medial border of) scapula

acromiotrapezius (origin and insertion)

cervical vertebrae, spine of scapula

sternohyoid (action)

depresses (the) larynx (swallowing)

digastric (origin and insertion)

digastric fossa of mandible, intermediate tendon

rhomboideus capitus (action)

draw (the) scapula forward

pectoralis major (action)

draws forelimb toward chest

levator scapulae ventralis (action)

elevates (the) scapula

thyrohyoid (action)

elevates the larynx (swallowing, speech)

pectoralis minor (origin and insertion)

entire sternum, proximal humerus

triceps brachii, lateral head (action)

extends elbow

triceps brachii, long head (action)

extends elbow

splenius (action)

extends the head (and) flexes it laterally

biceps brachii (action)

flexes (the) lower forelimb

sternomastoid (action)

flexes head upon (the) chest, inclines it to one side

latissimus dorsi (origin and insertion)

lumbodorsal fascia, lumbar and thoracic vertebrae, proximal humerus

brachiocephalic (action)

moves forelimb anteriorly

latissimus dorsi (action)

moves forelimb dorsally and posteriorly

scalenus medius (origin and insertion)

neck and thorax (on the ribs), cervical vertebrae

rhomboideus capitus (origin and insertion)

occipital (bone), scapula

triceps brachii, long head (origin and insertion)

posterior (border of the) scapula, olecranon (process) of ulna

triceps brachii, lateral head (origin and insertion)

proximal (end of) humerus, olecranon (process) of ulna

spinodeltoid (action)

raises the humerus (acts in unison with acromiodeltoid)

teres major (action)

rotates humerus laterally, flexes shoulder, adducts forelimb

acromiodeltoid (origin and insertion)

scapula, mid-humerus

thyrohyoid (origin and insertion)

thyroid cartilage (of larynx), hyoid (bone)

pectoralis major (origin and insertion)

upper sternum, humerus


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