Gross Anatomy Block 3 - Week Three: Origins, Insertions, Actions, Innervations

Abductor Hallucis Origin

Tuberosity of Calcaneus

Abductor Hallucis Insertion

Medial Base of Proximal Phalanx of Hallucis

Abductor Hallucis Innervation

Medial Plantar Nerve

Abductor Hallucis Action

Flexes and Abducts Great Toe

Flexor Digitorum Brevis Origin

Medial Tuberosity of Calcaneus

Flexor Digitorum Brevis Insertion

Middle Phalanx of Toes 2-5

Flexor Digitorum Brevis Innervation

Medial Plantar Nerve

Abductor Digiti Minimi (Foot) Origin

Medial and Lateral Processes of Calcaneal Tuberosity

Abductor Digiti Minimi (Foot) Insertion

Lateral Surface of Proximal Phalanx of Fifth Metatarsal

Abductor Digiti Minimi (Foot) Innervation

Lateral Plantar Nerve

Quadratus Plantae Origin

Lateral Process of Calcaneal Tuberosity, Medial Side of Calcaneus

Quadratus Plantae Insertion

Tendon of Flexor Digitorum Longus

Quadratus Plantae Innervation

Lateral Plantar Nerve

Quadratus Plantae Action

Flexes Lateral Four Toes

Lumbricals Origin

Medial Side of Flexor Digitorum Longus Tendons

Lumbricals Insertion

Extensor Expansions and Dorsal Surface of Proximal Phalanx of Lateral Four Toes

Lumbricals Innervation

Lumbrical 1 - Medial Plantar Nerve

Lumbrical 2-4 - Lateral Plantar Nerve

Lumbricals Action

MTP Flexion, IP Extension

Flexor Hallucis Brevis Origin

Cuboid and Third Cuneiform

Flexor Hallucis Brevis Insertion

Lateral and Medial Base of Proximal Phalanx of Hallucis

Flexor Hallucis Brevis Innervation

Medial Plantar Nerve

Flexor Hallucis Brevis Action

Flexes Proximal Phalanx of Hallucis

Adductor Hallucis Origin

Oblique Head - Peroneus Longue Tendon Sheath, Base of Metatarsals 2-4

Transverse Head - Ligaments of MTP 2-4

Adductor Hallucis Insertion

Lateral Base of Proximal Phalanx (via Common Tendon); Join Medial part of Flexor Hallucis Brevis Tendon and Sesamoid Bone

Adductor Hallucis Innervation

Lateral Plantar Nerve

Adductor Hallucis Action

Adducts Big Toe

Flexor Digiti Minimi Brevis Origin

Lateral Side of Base of 5th Metatarsal and Fibularis Longus Tendon Sheath

Flexor Digiti Minimi Brevis Insertion

Proximal Phalanx of 5th Toe

Flexor Digiti Minimi Brevis Innervation

Lateral Plantar Nerve

Flexor Digiti Minimi Brevis Action

Flexes Proximal Phalanx of 5th Toe

Plantar Interossei Origin

Medial Side of Shafts and Base of Metatarsals 3-5

Plantar Interossei Insertion

Base of Proximal Phalanx and Extensor Expansion of Digits 3-5

Plantar Interossei Innervation

Lateral Plantar Nerve

Plantar Interossei Action

Adducts Toes 3-5, Flexes MTP and Extends IP

Dorsal Interossei Origin

Sides of Adjacent Metatarsals

Dorsal Interossei Insertion

1st Dorsal Interossei - Medial Base of Proximal Phalanx of Digit 2

2nd Dorsal Interossei -Lateral Base of Proximal Phalanx of Digit 2

3rd Dorsal Interossei - Lateral Base of Proximal Phalanx of Digit 3

4th Dorsal Interossei - Lateral Base of Proximal Phalanx of Digit 4

all insert onto extensor expansions

Articularis Genus Origin

Distal Femur

Articularis Genus Insertion

Synovial Membrane of Knee Joint

Articularis Genus Action

Pull Synovium Up/Superiorly during Extension