Muscles Origination and Insertion points - ASC 310: Exam 2

Common Digital Extensor

Thoracic

Insertion: Extensor process on P3

Origination: Cranial lateral side of radius

Lateral Digital Extensor

Thoracic

Insertion: Dorsal side of P1

Origination: Cranial lateral side of radius (more lateral than CDET)

Deep Digital Flexor

Thoracic

Insertion: Flexor surface on P3

Origination: Caudal medial side of radius

Superficial Digital Flexor

Thoracic

Insertion: 4pts of insertion — Palmer, distal end of P1 (abaxially to DDFT). Palmer, proximal end of P2 (abaxially to DDFT).

Origination: Caudal medial side of radius (more medial than DDFT)

Common (Long) Digital Extensor

Pelvic

Insertion: Extensor process on P3

Origination: Cranial lateral side of Tibia

Lateral Digital Extensor

Pelvic

Insertion: Dorsal side of P1

Origination: Cranial lateral side of tibia (more lateral than CDET)

Deep Digital Flexor

Flexor

Insertion: Flexor surface on P3

Origination: Caudal medial side of tibia

Superficial Digital Flexor

Pelvic

Insertion: 5pts of insertion — Calcaneus of hock. Plantar, distal end of P1 (abaxially to DDFT). Plantar, proximal end of P2 (abaxially to DDFT).

Origination: Caudal distal side of femur

Semitendinosus

Pelvic

Insertion: Tibia and fascia

Origination: Sacrum and Ischiatic tuberosity

Brachiocephalicus

Thoracic

Insertion: Temporal bone of skull

Origination: Humerus (mid-way down bone)

Sternomandibularis

N/A

Insertion: Mandible

Origination: Sternum

Serratus ventralis

Thoracic

Insertion: Medial Scapula

Origination: Caudal cervical vertebrae and lateral/dorsal ribs

Pectoral muscles

Thoracic

Insertion: Medial Humerus

Origination: Sternum and ventral/lateral ribs

Psoas minor and Iliopasoas muscles

Pelvic

Insertion: Cranial pelvis (ilium)

Origination: Ventral lumbar vertebrae

Peroneus Tertius

Pelvic

Insertion: Cranial distal femur

Origination: Cranial/dorsal and proximal end of 3rd metatarsal and tarsal bones