OIAI Foot

Extensor Hallucis Brevis Origin

Calcaneus

Extensor Hallucis Brevis Insertion

1st toe proximal phalanx

EExtensor Hallucis Brevis action

1st MTP extension

Extensor Hallucis Brevis Innervation

Deep fibular n. (L5-S1)

Extensor Hallucis Brevis Vascular supply

Dorsalis pedis a.

Extensor Hallucis Brevis Derivation

Dorsal

Extensor Digitorum Brevis Origin

Calcaneus

Extensor Digitorum Brevis Insertion

2nd to 4th toes dorsal base of middle phalanx

Extensor Digitorum Brevis Action

MTP and PIP Extension of 2nd to 4th phalanges

Extensor Digitorum Brevis Innervation

Deep fibular n (L5-S1)

Extensor Digitorum Brevis Vascular supply

Dorsalis pedis a

Extensor Digitorum Brevis Derivation

Dorsal

Flexor Digitorum Brevis Origin

Calcaneal tuberosity, plantar aponerosis

Flexor Digitorum Brevis Insertion

Plantar middle phalanx of toes 2-5

Flexor Digitorum Brevis Action

Fleexes MTP and PIP joints of 2-5 toes, supports longitudinal arch

Flexor Digitorum Brevis Innervation

Medial plantar n. (S1-2)V

Flexor Digitorum Brevis Vascular Supply

Medial plantar a, lateral plantar a

Flexor Digitorum Brevis Derivation

Ventral

Lumbricals Origin

Flexor Digitorum Longus tendon

Lumbricals Insertion

Dorsal digital expansion of toes 2-5

Lumbricals Action

Flexes MTP joint of 2nd-5th toes, extension of IP joint of 2-5 toes

Lumbricals Innervation

1st; medial plantar n (S2-S3) 2nd-4th: Lateral plantar n (S2-S3)

Lumbricals Vascular supply

Lateral plantar a, Dorsalis pedis aL

Lumbricals Derivation

Ventral

Quadratus Plantae Origin

Medial and lateral calcaneus

Quadratus Plantae Inseretion

Flexor digitorum longus tendon

Quadratus Plantae Action

Flexes toes, Redirects FDL angle of pull

Quadratus Plantae Innervation

Lateral plantar n (S1-S3)

Quadratus Plantae Vascular supply

Medial plantar a, lateral plantar a, deep plantar arch

Adductor Hallucis Origin

Oblique head: Medial tarsal bones, Distal Metatarsals

Adductor Hallucis Insertion

1st proximal phalanx

Adductor Hallucis Action

Flexes first MTP joint, Adducts the hallux, transverse head supports transverse arch, Oblique head: Supports longitudinal arch

Adductor hallicus Innervation

Lateral plantar N (S1-3)A

Adducter hallucis Vascular supply

Lateral plantar a

Adducter hallucis derivation

ventral

Plantar interossei Origin

3rd-5th Metatarsals

Plantar interossei insertion

3rd to 5th medial base of proximal phalanx

Plantar Interossei Action

Adducts 3rd-5th phalanges toward 2nd

Plantar Interossei Innervation

Lateral plantar n (S1-3)

Plantar Intereossei Vascular supply

Lateral Plantar a.

Plantar interossei derivation

Ventral

Dorsal interossei origin

1st-5th metatarsals

Dorsal interossei insertion

1st interosseus: 2nd proximal phalanx, 2nd-4th interossei: 2nd-4th proximal phalanges

Dorsal interossei Action

Abducts 3rd and 4th toes from 2nd toee medially and laterally abducts 2nd toe

Dorsal interossei innervation

Lateral plantar n (S1-3)

Dorsal interossei Vascular supply

Lateral plantar a.

Dorsal interossei derivation

ventral

Flexor Hallucis Brevis Origin

Medial cuneiform and surrounding ligaments

Flexor Hallicus Brevis Insertion

Base of 1st proximal phalanx via sesamoids

Flexor Hallucis Brevis Action

Flexes first MTP joint

Flexor Hallucis Brevis Innervation

Medial plantar n (S2-3)

Flexor Hallucis Brevis Vascular supply

Medial Plantar a.

Abductor hallucis origin

Calcaneal tuberosity, flexor retinaculum, plantar aponeurosis

Abductor Hallucis Insertion

Medial base of 1st proximal phalanx via sesamoid bones

Abductor Hallucis Action

Flexes first MTP joint, Abducts the 1st MTP joint, supports longitudinal arch

Abductor Hallucis Innervation

Medial plantar n (S2-3)

Abductor Hallucis Vascular Supply

Medial Plantar a.

Abductor Hallucis derivation

Ventral

Abductor Digiti Minimi Origin

Calcaneal tuberosity (medial tubercle), Plantar aponeurosis

Abductor Digiti Minimi Insertion

5th toe (base of proximal phalanx), 5th metatarsal (tuberosity)

Abductor Digiti Minimi Action

Abducts 5th digit, flexes MTP of 5th toe, supports longitudinal arch

Abductor Digiti Minimi Innervation

Lateral plantar n (s2-S3

Abductor Digiti Minimi vascular supply

Lateral plantar a.

Abductor Digiti Minimi derivation

ventral

Flexor Digiti Minimi Brevis Origin

Base of 5th metatarsal, long plantar ligament

Flexor Digiti Minimi Brevis insertion

Base of 5th proximal phalanx

Flexor Digiti Minimi Brevis Action

Flexes MTP of 5th toeFlexor Digiti Minimi Brevis

Flexor Digiti Minimi Brevis Innervation

Lateral plantar n (S2-3)

Flexor Digiti Minimi Brevis Vascular supply

Lateral plantar a.

Flexor Digiti Minimi Brevis derivation

ventral

Opponens Digiti Minimi Origin

Long Plantar ligament, base of 5th metatarsal, Fibularis longus (at plantar tendon sheath)

Opponens Digiti Minimi Insertion

Lateral distal 5th metatarsal

Opponens Digiti Minimi Action

Pulls 5th metatarsal in plantar and medial direction

Opponens Digiti Minimi Innervation

Superficial branch of lateral plantar n (S2-3)

Opponens Digiti Minimi vascular supply

Lateral plantar a.

Opponens Digiti Minimi derivation

ventral