Lumbrical Muscles and Bursae,
Spaces, and Sheaths: Schema
Thenar space, Midpalmar space (Synovial)
tendon sheaths of fingers, Usual arrangement, Intermediate bursa (communication
between common flexor sheath [ulnar bursa] and tendinous sheath of flexor
pollicis longus [radial bursa]),
Flexor digitorum profundus tendons 1st and 2nd
lumbrical muscles (unipennate), Lumbrical tendons insert into extensor expansion
system, Common variation 3rd and 4th lumbrical muscles (bipennate), Proximal
lumbrical tendons arise from flexor digitorum profundus tendons, Flexor
digitorum superficialis tendons (cut), Lumbrical muscles: schema, Palmar
ligaments (palmar plates) A2 C1 A3 C2 A4 C3 A5, Tendinous sheath of flexor pollicis
longus muscle, Common flexor sheath, Lumbrical muscles (in fascial sheaths) (Synovial)
tendon sheath, Tendons of flexor digitorum superficialis and profundus muscles
Note: Flexor digitorum
superficialis and profundus tendons encased in synovial sheaths are bound to phalangeal
bones by fibrous digital sheaths made up of alternating strong anular (A) and
weaker cruciform (C) parts.
