Mink dissection terms

Mylohyoid

Origin: medial surface of mandible

Insertion; hyoid

Action: raises floor of mouth (helps w/ swallowing)

Digastric

Origin: mastoid process

Insertion: mandible

Action: depresses mandible (opens mouth)

Sternohyoid

Origin: first rib and sternum

Insertion: hyoid bone

Action: pulls tongue backward (helps with swallowing)

Sternomastoid

Origin: sternum

Insertion: mastoid process

Action: One side: turns head opposite (together: flexes head)

Masseter

Origin: zygomatic arch

Insertion: mandible

Action: Lifts mandible (closes jaw/mouth)

Temporalis

Origin: temporal fossa

Insertion: coronoid process of mandible

Action: lifts mandible (closes jaw/mouth)

Pectoralis major

Origin: sternum

Insertion: humerus

Action: adducts arm, pulls shoulder forward

Pectoralis minor

Origin: sternum ribs

Insertion: humerus/scapula

Action: pulls scapula anterior (protracts) and inferior adducts arm

Rectus abdominis

Origin: pubic bone

Insertion: costal cartilage

Action: flexes trunk and compresses abdomen

External oblique

Origin: caudal ribs

Insertion: linea alba

Action: compresses abdomen, flexes and rotates trunk

Internal oblique

Origin: iliac crest

Insertion: linea alba

Action: compresses abdomen, flexes and rotates trunk

transverse abdominis

Origin: caudal ribs, tps of lumbar vertebra

Insertion: linea alba

Action: compresses abdomen

Clavotrapezius

Origin: occiput

Insertion: clavicle

Action: pulls humerus forward

Acromiotrapezius

Origin: S.P. of axis to S.P of 4th thoracic vert

Insertion: acromion process of scapula

Action: adducts and stabilizes scapula

Spinotrapezius

Origin: S.P of thoracic spine

Insertion: scapular spine

Action: rotates scapula backwards

Clavodeltoid

Origin: clavicle

Insertion: deltoid tuberosity

Action: pulls humerus forward and abducts humerus

Acromiodeltoid

Origin: acromion process

Insertion: deltoid tuberosity

Action: abducts and pulls humerus forward

Spinodeltoid

Origin: scapular spine

Insertion: deltoid tuberosity

Action: abduct humerus and externally rotates

Latiissimus dorsi

Origin: dorsal fascia of thorax

Insertion: proximal humerus

Action: pulls humerus backwards (and downward in humans)

Rhomboidius (major & minor)

Origin: S.P or first 4 thoracic verts and occiput

Insertion: vertebral border of scapula

Action: adducts scapula and pulls it cranially

Supraspinatus

Origin: supraspinous fossa of scapula

Insertion: greater tubercle of humerus

Action: abducts arm

Infraspinatus

Origin: infraspinous fossa

Insertion: greater tubercle

Action: rotates arm externally

Teres minor

Origin: scapula

Insertion: proximal humerus

Action: rotates arm externally

Subscapularis

Origin: subscapular fossa

Insertion: lesser tubercle

Action: rotates arm medially