Layers of the Plantar foot

Question 1

Can you name the layers of the planar foot?

Answer 1

• 5 layers
• 1 dorsal layer and 4 plantar layers

Question 2

What is in layer 1?

Answer 2

• Dorsal layer
  
  • Extensor digitorium brevis = EDB
  • extends toes 2-4

Question 3

What is in the first plantar layer?

Answer 3

• Abductor Hallucis
  
  • medial plantar nerve, abducts great toe
• Flexor digitorium brevis
  
  • ​Insert into lateralsurface of middle phalanx
  • medial plantar nerve
• Abductor digiti minimi
  
  • ​Lateral plantar nerve

Question 4

What is in the second plantar layer?

Answer 4

• Quadratus plantae
  
  • inserts FDL tendon
  • helps flex distal phalnges
  • lateral planar nerve
• lumbrical muscles
  
  • Origin- FDL tendon
  • inserts-EDL tendon
  • Medial and lateral planat nerve
  • Flex MTP adn extends IPJ
• Flexor digitorium longus- FDL
  
  • origin- posterior aspect of tibia
  • splits into 4 thru medial intermuscular septum inserts planat sriface base 2-5th distal phalanges
  • tibial nerve
• Flexor hallucis longus- FHL
  
  • inferior 2/3 post tibia
  • inserts plantar base of distal phalanx of great toe
  • flexes great toe

Question 5

What is in the third plantar layer?

Answer 5

• Flexor hallucis brevis
  
  • origin- cuboid
  • inserts- prox phalanx of rgeat toe
  • flexes greta toe
  • medial planar nerve
• adductor hallucis
  
  • Oblique 2-4th MT
  • Inserts prox phalanx great toe- lateral
  • adducts great toe
  • lateral plantar nerve
• flexor digiti minimi brevis
  
  • ​base of 5th MT
  • inserts- prox phalanx small toe
  • actions- flexes small toe
  • lateral plantar nerve

Question 6

what is in the fourth layer?

Answer 6

• Dorsal interosseous
  
  • from 2 heads from proximal half od sides of adjacent metatarsals
  • insert- form a central tendon that inserts on base of 2-4 phalanges
  • Abduct MTPJ
  • Lateral plantar nerve
• Plantar interosseus
  
  • origin 3-5 mt
  • insert prox phalanges medially
  • ADDUCTS toes
  • lateral plantar nerve
• Peroneus longus
  
  • head of fibular
  • to plantar postemdial medial cuneiform adn lateral side 1st MT
    
    • superificial peroneal n
    • everts foot and plantarflexes ankle
• Tibialis posterior
  
  • Post sup 2/3 surface fibular and intermuscular septum
  • splits into 2 inerts navicular , medial cuneiform and planatrsurface of 2-4MT & 2nd cuneiform
  • invertor foot, adducts foot and plantarflexes ankle
  • tibial nerve

Question 7

now describe what is all the plantar layers of the foot?

Answer 7

http://www.orthobullets.com/video/view?id=211