Lab 9 Musculature Flashcards
Extensor digitorum brevis origin
Anterior and lateral calcaneus
Extensor digitorum brevis insertion
Extensor expansions of toes 1-4
Extensor digitorum brevis action
Extension of toes 1-4
Extensor digitorum brevis nerve supply
Deep peroneal nerve
Extensor digitorum brevis blood supply
Dorsalis pedis artery
Abductor hallucis origin
Calcaneus
Abductor hallucis insertion
Medial surface of base of proximal phalanx of great toe
Abductor hallucis action
Flexion and abduction of great toe at MTP joint
Abductor hallucis nerve supply
Medial plantar nerve
Abductor hallucis blood supply
Medial plantar artery
Flexor digitorum brevis origin
Calcaneus
Flexor digitorum brevis insertion
Slips onto both sides of bases of middle phalanges of toes 2-5
Flexor digitorum brevis action
Flexion of toes 2-5 at PIP joints
Flexor digitorum brevis nerve supply
Medial plantar nerve
Flexor digitorum brevis blood supply
Medial plantar artery
Abductor digiti minimi origin
Calcaneus
Abductor digiti minimi insertion
Lateral side of base of proximal phalanx of toe 5
Abductor digiti minimi action
Flexion and abduction of toe 5 at MTP joint
Abductor digiti minimi nerve supply
Lateral plantar nerve
Abductor digiti minimi blood supply
Lateral plantar artery
Quadratus plantae origin
Calcaneus
Quadratus plantae insertion
Lateral surface of flexor digitorum longus tendon
Quadratus plantae action
Flexion of toes 2-5 at DIP joints
Quadratus plantae nerve supply
Lateral plantar nerve
Quadratus plantae blood supply
Lateral plantar artery
Lumbricals origin
Tendons of flexor digitorum longus
Lumbricals insertion
Extensor expansion of toes 2-5
Lumbricals action
Flexion of toes 2-5 at MTP joints
Extension of toes 2-5 at IP joints
Lumbricals nerve supply
Toe 2: medial plantar nerve
Toes 3-5: lateral plantar nerve
Lumbricals blood supply
Lateral plantar artery
Flexor hallucis brevis origin
Cuboid and lateral cuneiform bones
Flexor hallucis brevis insertion
Medial and lateral sides of base of proximal phalanx of great toe
Flexor hallucis brevis action
Flexion of great toe at MTP joint
Flexor hallucis brevis nerve supply
Medial plantar nerve
Flexor hallucis brevis blood supply
Medial plantar artery
Adductor hallucis origin
- Oblique head: bases of 2nd through 4th metatarsals
2. Transverse head: deep transverse metatarsal ligament and plantar plates of 3rd through 5th MTP joints
Adductor hallucis insertion
Lateral side of base of proximal phalanx of great toe
Adductor hallucis action
Adduction and flexion of great toe at MTP joint
Adductor hallucis nerve supply
Lateral plantar nerve
Adductor hallucis blood supply
Lateral plantar artery
Flexor digiti minimi origin
Base of 5th metatarsal
Flexor digiti minimi insertion
Lateral surface of base of proximal phalanx of toe 5
Flexor digiti minimi action
Flexion of toe 5 at MTP joint
Flexor digiti minimi nerve supply
Lateral plantar nerve
Flexor digiti minimi blood supply
Lateral plantar artery
Dorsal interossei origin
Bipennate from adjacent metatarsals
Dorsal interossei insertion
Base of proximal phalanges and extensor expansions at medial side of toe 2 and lateral sides of toes 2-4
Dorsal interossei action
- Abduction and flexion of toes 2-4 at MTP joints
2. Extension of toes 2-4 at IP joints
Dorsal interossei nerve supply
Lateral plantar nerve
Dorsal interossei blood supply
Lateral plantar artery
Plantar interossei origin
Medial sides of metatarsals 3-5
Plantar interossei insertion
Medial sides of bases of proximal phalanges and extensor expansions of toes 3-5
Plantar interossei action
- Adduction and flexion of toes 3-5 at MTP joints
2. Extension of toes 3-5 at IP joints
Plantar interossei nerve supply
Lateral plantar nerve
Plantar interossei blood supply
Lateral plantar artery
Masseter origin
Zygomatic arch
Masseter insertion
Angle and ramus of mandible
Masseter action
Elevation and protraction of jaw
Masseter nerve supply
Cranial nerve V
Masseter blood supply
Branches of external carotid artery
Temporalis origin
Temporal fossa of frontal, parietal and temporal bones
Temporalis insertion
Coronoid process of mandible
Temporalis action
Elevation and retraction of jaw
Temporalis nerve supply
Cranial nerve V
Temporalis blood supply
Branches of external carotid artery
Sternocleidomastoid origin
Sternal head: manubrium of sternum
Clavicular head: medial clavicle
Sternocleidomastoid insertion
Mastoid process of temporal bone
Sternocleidomastoid action
Bilaterally: flexion of neck
Unilaterally: ipsilateral lateral flexion of neck and contralateral rotation of neck
Sternocleidomastoid nerve supply
Cranial nerve XI
Sternocleidomastoid blood supply
Branches of external carotid artery
Platysma origin
Fascia over upper, lateral chest
Platysma insertion
Skin, fascia, and muscles of mandible
Platysma action
Depression of mandible and lower lip; tension of skin of neck
Platysma nerve supply
Cranial nerve VII
Platysma blood supply
Transverse cervical artery and branches of the external carotid artery