thenar muscle การใช้

• There s no evidence of thenar muscles and rarely functioning tendons.
• The thumb has one long flexor and a short flexor in the thenar muscle group.
• In " Ape hand deformity ", the thenar muscles become paralyzed due to impingement and are subsequently flattened.
• Carpal tunnel syndrome can result in thenar muscle paralysis which can then lead to ape hand deformity if left untreated.
• This hand deformity is not by itself an individual diagnosis; it is seen only after the thenar muscles have atrophied.
• It can occur with an injury of the median nerve either at the elbow or the wrist, impairing the thenar muscles and opponens pollicis muscle.
• Running forward, it passes through, occasionally over, the thenar muscles, which it supplies, and sometimes anastomoses with the terminal portion of the ulnar artery, completing the superficial palmar arch.
• -"'Type II "'is characterized by a tight web space between the thumb and index finger which restricts movement, poor thenar muscles and an unstable middle joint of the thumb metacarpophalangeal joint.
• Regardless of their final innervation, the nerves that reach the thenar muscles arise from the C8 and T1 roots, pass through the lower trunk of the plexus, and then through the medial cord of the plexus.
• Numbness in the distribution of the median nerve, nocturnal symptoms, thenar muscle weakness / atrophy, positive Tinel's sign at the carpal tunnel, and abnormal sensory testing such as two-point discrimination have been standardized as clinical diagnostic criteria by consensus panels of experts.