In the same year, Riche (1897) described three types of connections: Type I, between the deep branch of ulnar nerve and the branch of the median nerve, destined to both heads of the FPB; Type II, between the deep branch of ulnar nerve and the median nerve within the belly of the transverse head of the adductor pollicis; Type III, between these two nerves within the belly of the lumbrical
MMT at the beginning of the rehabilitation on the affected side was as follows: deltoid, 2; biceps brachii, 2; triceps brachii, 4; wrist flexion muscles, 4; wrist extension muscles, 4; lumbricals
, 4; and interosseous muscle, 4.
Superficial recording electrodes were placed over APB (at 8 cm distance from the stimulus site), second lumbrical
muscle (at 10 cm distance from stimulus site), and second interosseous muscle (at 10 cm distance from stimulus site).
INTRODUCTION: The lumbrical
muscle is so named because it resembles the shape, size and color of an earthworm.
Neurophysiological grades were defined as (a) mild CTS: prolonged distal sensory peak latency with +- decreased sensory amplitude, (b) moderate CTS: abnormal median sensory peak latencies with prolongation of the distal motor latency, (c) severe CTS: prolonged motor and sensory distal peak latency either with a low or absent sensory nerve action potential (SNAP) or compound muscle action potential (CMAP), (d) very severe CTS: absent thenar motor or sensory response either with a present or absent lumbrical
The extension of the long fingers is actually through a synergistic action between extensors, interosseous and lumbrical
. Once past the metacarpophalangeal joint, the extensor tendon is divided into three bands, the central portion which receives some of the fibers from lumbrical
muscles, that goes to insert on the proximal interphalangeal joint capsule at the base of the second phalanx.
The co-ordination of extension of the PIP with simultaneous flexion of the MCP is known to be underpinned by the action of the hand lumbrical
Carpal tunnel syndrome due to gouty infiltration of lumbrical
muscles and flexor tendon.
El nervio mediano inerva el oponente y el abductor corto del pulgar, el primer y segundo lumbrical
y parte del flexor corto del pulgar.
The American Society of Plastic and Reconstructive Surgeons recommends surgical release in the following situations (6): (1) failed or incomplete conservative therapy; (2) motor weakness or thenar atrophy; (3) lumbrical
pattern symptoms (occur when the metacarpophalangeal joints are held at 90 degrees, eg, driving, letter writing, holding a magazine, pinching, using a small tool); (4) severe pattern on electrical studies (not defined); (5) space-occupying lesions requiring excision; (6) acute carpal tunnel syndrome with symptoms lasting longer than 6 to 8 hours; and (7) progressive or severe symptoms lasting longer than 12 months.