Musculoskeletal: Lower Extremity: Metatarsal-phalangeal Joint: Osteokinematics and Arthrokinematics

Question 1

Metatarsal-phalangeal Joints

Osteokinematic: Abduction

Answer 1

• Arthrokinematics of the metatarsal-phalangeal joints during abduction in an open kinetic chain
• In the open kinetic chain the concave first and second proximal phalanx will roll and glide MEDIALLY on the convex metatarsal.
• In the open kinetic chain the concave third and fourth proximal phalanx will roll and glide LATERALLY on the convex metatarsal.
• Arthrokinematics of the metatarsal-phalangeal joints during abduction in the closed kinetic chain.
• In the closed kinetic chain the convex metatarsal will roll MEDIALLY and glide LATERALLY on the first and second concave proximal phalanx.
• In the closed kinetic chain the convex metatarsal will roll LATERALLY and glide MEDIALLY on the third and fourth concave proximal phalanx.

Question 2

Metatarsal-phalangeal Joints

Osteokinematic: Adduction

Answer 2

• Arthrokinematics of the metatarsal-phalangeal joints during adduction in an open kinetic chain
• In the open kinetic chain the concave first and second proximal phalanx will roll and glide LATERALLY on the convex metatarsal.
• In the open kinetic chain the concave third and fourth proximal phalanx will roll and glide MEDIALLY on the convex metatarsal.
• Arthrokinematics of the metatarsal-phalangeal joints during adduction in the closed kinetic chain.
• In the closed kinetic chain the convex metatarsal will roll LATERALLY and glide MEDIALLY on the first and second concave proximal phalanx.
• In the closed kinetic chain the convex metatarsal will roll MEDIALLY and glide LATERALLY on the third and fourth concave proximal phalanx.