Plantar Surface of the Foot Flashcards
The deep fascia in the foot goes weaker where?
Medial and Laterally
What is the deep fascia?
Thick central portion
What is formed by the central portion of the deep fascia?
Superficial ligament
What is found in the plantar aponeurosis?
Superficial ligament and vertical inter muscular septae
What is the proximal attachment of the plantar aponeurosis?
Calcaneus which divides into 5 bands distally and is continuous with fibrous digital sheaths
Where is the vertical inter muscular septae?
Medial, Central and Lateral compartment
What are the muscles of dorsal of foot?
Extensor Digitorum Brevis and Extensor Hallucis Brevis
What are the muscles of the little toe in the lateral compartment?
Abductor Digiti Minimi and Flexor Digiti Minimi Brevis
What are the muscles of the great toe in the middle compartment?
Abductor Hallucis and Flexor Hallucis Brevis
What are the interossei?
Plantar and Dorsal interossei
What are the muscles in the central compartment?
Flexor Digitorum Brevis and Adductor Hallucis
What is the proximal attachment of the Abductor Hallucis?
Medial tubercle of Calcaneus and flexor retinaculum
What is the distal attachment of the Abductor Hallucis?
Medial base proximal phalanx
What is the proximal attachment of the Flexor Digitorum Brevis?
Medial tubercle of Calcaneus
What is the distal attachment of the Flexor Digitorum Brevis?
Middle phalanges of lateral 4 toes
What is the proximal attachment of the Abductor Digits Minimi?
Medial and lateral tubercle of Calcaneus
What is the distal attachment of the Abductor Digits Minimi?
Lateral base proximal phalanx
What are the muscles in the first layer of the foot?
Abductor Hallucis, Flexor digitorum Brevis and Abductor Digiti Minimi
What are is found in the second layer of the foot?
Lumbricals and Quadratus Plantae
What are the long flexor tendons to the toes?
Flexor digitorum longus and Flexor Hallucis longus
What is the proximal attachment of the lumbricals?
Tendons of the Flexor digitorum longus
What is the distal attachment of the lumbricals?
Medial side of dorsal tendon expansion
What is the proximal attachment of Quadratus Plantae?
Medial and lateral surfaces of Calcaneus
What is the distal attachment of the Quadratus Plantae?
Lateral side of Flexor digitorum longus tendon
How many lumbricals?
4
What is found in the 3rd layer of the foot?
Flexor hallucis brevis, Adductor Hallucis aan Flexor Digiti Minimi Brevis
What is the proximal attachment of the Flexor Hallucis Brevis?
Cuboid and lateral cuneiform
What is the distal attachment of the Flexor Hallucis Brevis?
Both sides base proximal phalanx of hallux
What is the proximal attachment of Adductor Hallucis on the Transverse head?
Plantar ligament of MTP joints
What is the proximal attachment of Adductor Hallucis on the Oblique head?
Base metatarsals 2-4
What is the distal attachment of the Adductor Hallucis?
Lateral side base proximal phalanx of hallux
What is the proximal attachment of Flexor Digiti Minimi Brevis?
Base 5th metatarsal
What is the distal attachment of the Flexor Digiti Minimi Brevis?
Base proximal phalanx of 5th digit
What is found in the 4th layer of the foot?1
Interossei
How many Plantar Interossei?
3
How many dorsal interossei?
4
What is the proximal attachment of the plantar interossei?
Bases and medial side of metatarsals 3-5 (uni-innate)
What is the distal attachment of the plantar interossei?
Medial side of proximal phalanx of 3rd - 5th digit
What is the function of plantar interossei?
PAD - Plantar ADduct
What is the function of dorsal Interossei?
DAB - Dorsal ABduct
What is the proximal attachment of the dorsal Interossei?
Adjacent sides of metatarsals 1-5 (bipennate)
What is the distal attachments of dorsal Interossei?
1st on medial side proximal phalanx of 2nd digit.
2nd-4th on lateral side proximal phalanx of 2nd-4th digits
What is important about 2nd toe?
Is axial digit of foot
What is found in the 4th layer of the foot?
Peroneus Longus tendon and Tibialis Posterior tendon
What are the terminal branches of tibial nerve deep to?
Flexor Retinaculum
Where do plantar nerves enter the foot?
Deep to Abductor Hallucis
Where is the medial plantar nerve?
Between Abductor Hallucis and Flexor Digitorum Brevis
Where is the lateral plantar nerve?
Between layers 1 and 2
Where are deep branches of the lateral plantar nerve?
Between layers 3 and 4
What does the medial plantar nerve innervate?
Abductor Hallucis, Flexor Digitorum Brevis, 1st lumbrical and Flexor Hallucis Brevis
What does the lateral plantar nerve innervate?
All other muscles that are not innervated by Medial Plantar nerve
What are the roots of Plantar nerves?
S2 and S3
What are the terminal branches of posterior Tibial artery deep to?
Flexor Retinaculum
Where does the Plantar arteries enter the foot?
Deep to Abductor Hallucis
What does the medial plantar artery supply?
Muscles of hallux and overlying skin, occasionally superficial plantar arch
Where is the lateral plantar artery found?
Between layers 1 and 2
Where is the deep plantar arch?
Between layers 3 and 4
Where is the deep plantar artery from?
Dorsalis Pedis
What are the branches of the lateral plantar artery?
Plantar metatarsal and digital arteries