Muscular System 1/21

Question 1

Latissimus Dorsi OIA

Answer 1

Origin: Neural spines of last thoracic and lumbar vertebrae and lumbodorsal fascia
Insertion: Medial Surface of Humerus
Action: Pulls forelimb dorsally and caudally

Question 2

Thoracic Trapezius (Spinotrapezius) OIA

Answer 2

Origin: Spines of thoracic vertebrae
Insertion: Fascia of Scapula
Action: Draws scapula dorsad and caudad

Question 3

Cervical Trapezius (Acromiotrapezius) OIA

Answer 3

Origin: Spines of cervical and 1st thoracic vertebrae
Insertion: Metacromion process, spine of scapula, and fascia of thoracic trapezius
Action: Draws scapula dorsad and holds scapula together

Question 4

Cleido Cervicalis (Clavotrapezius) OIA

Answer 4

Origin: Superior Nuchal line and Median Dorsal line of Neck
Insertion: Clavical
Action: Draws clavical dorsad and craniad

Question 5

Rhomboideus Major

Answer 5

Origin: Spines of Upper thoracic vertebrae
Insertion: Medial Border of Scapula
Action: Raises and adducts scapula

Question 6

Rhomboideus Minor

Answer 6

Origin: Lower Cervical Vertebrae
Insertion: Vertebral border of scapula
Action: Raises and adducts scapula

Question 7

Rhomboideus Capitis

Answer 7

Origin: Superior nuchal line
Insertion: Scapula
Action Draws scapula cranaid and rotates it