Foot Muscles

1
Foot Muscles

• Origin and Insertions

2
Abductor Hallucis

• O Medial calcaneal tuberosity
• I Medial aspect of base of 1st proximal phalanx
• N Tibial
• F ABD assist flexion of MTP joint 1st toe,
  
  -- Assist forefoot ADD

Cannot be palpated
3
Flexor Hallucis Brevis

• O Medial plantar surface of Cuboid, lateral
  (3rd) cuneiform
• I Medial and lateral sides of base of 1st
  phalanx
• N Tibial
• F Flexion MTP joint of 1st toe

Cannot be palpated
4
Adductor Hallucios

• Origin
• Oblique Head
• Bases 2-4 metatarsal bones
• Transverse Head
• Plantar MTP ligaments of 3-5 digits, transverse
  metatarsal ligaments
• I lateral side of base of 1st proximal phalanx
• N Tibial
• F ADD and assists in flexing MTP joint of 1st
  toe

Cannot be palpated
5
Quadratus Plantae

• Origin
• Medial Head
• Medial calcaneal surface
• Lateral Head
• Lateral calcaneal surface
• I lateral margin of Flexor Digitorum Longus
  Tendon
• N Tibial
• F Modify line of pull of FDL, assist with DIP
  flexion 2-5 digits

6
Lumbricales

• Origin
• 1st medial side of 1st FDL tendon
• 2nd adjacent sides 1st 2nd FDL tendon
• 3rd adjacent sides of 2nd 3rd FDL tendon
• 4th adjacent sides of 3rd and 4th FDL tendon
• I dorsal surface of 2-5 proximal phalanxes via
  EDL tendon
• N Tibial
• F flexion MTP 2-5 joints, IP joint extension
  2-5

7
Dorsal Interossei

• O each by two heads from adjacent sides of
  metatarsal bones
• Insertion
• 1st medial aspect of 2nd proximal phalanx
• 2nd 4th lateral aspects of 2-4 proximal
  phalanx
• N Tibial
• F MP ABD 2-4 digits

Cannot be palpated
8
Plantar Interossei

• O bases and medial sides of 3-5 metatarsal
  bones
• I medial aspects of bases of 3-5 proximal
  phalanxes
• N Tibial
• F MTP ADD/FL digits 3-5

Cannot be palpated
9
Flexor Digitorum Brevis

• O medial calcaneal tuberosity
• I medial and lateral aspects of 2-5 middles
  phalanxes
• N Tibial
• F MTP/PIP flexion 2-5 phalanges

Cannot be palpated
10
Flexor Digiti Minimi (Quinti) Brevis

• O base of 5th metatarsal
• I lateral aspect base of 5th proximal phalanx
• N lateral plantar nerve
• F MTP flexion 5 phalanx

Cannot be palpated
11
Abductor Digiti Minimi (Quinti)

• O Calcaneal Tuberosity
• I lateral aspect of 5th proximal phalanx
• N lateral plantar nerve
• F MTP ABD of 5th proximal phalanx

Cannot be palpated
12
Extensor Digitorum Brevis

• Origin
• Anterior and lateral calcaneus dorsal surface
• Insertion
• Base of proximal 1st phalanx
• Lateral sides EDL tendons 2-4 phalanges
• N Deep Peroneal
• F MTP extension 1-4 phalanges
• Assists with IP flexion 2-4 digits

Anterior and slightly below lateral malleolus
13
Extensor Hallucis Brevis

• O distal part of superior lateral calcaneous
• I doral surface of proximal 1st phalanx
• N Deep Peroneal
• F 1st MTP joint extension

Over dorsal aspect 1st phalanx