![]() Superficial palmar arch is an arched continuation of an ulnar artery in the palm which is completed by the superficial branch of radial artery on the lateral side. Adductor pollicis muscle is supplied by the deep branch of the ulnar. The muscle is enclosed in a fascial space known as the adductor space. It has two heads namely the transverse and the oblique. Adductor pollicis muscle lies at the deeper level almost in front of the metacarpal bones and the interossei. The thumb is capable of getting flexed, extended, adducted, abducted and can perform opponens. Carpometacarpal joint of the thumb is synovial saddle shaped joint between the concavoconvex base of the first metacarpal and the reciprocal articular surface of the trapezium. In case of the inflammation of the synovial sheath, the pressure inside the carpal tunnel increases giving rise to the pain along with the distribution of the median nerve. ![]() Median nerve passes through the carpal tunnel along with the tendons and their synovial sheaths. Palmar aponeurosis is a triangular fibrous expansion of the tenden of palmaris longus situated in the middle of the hand. It is important to remember that all lymphatics of the hand crowd on the dorsum of the hand hence, infection of the hand presents with oedema on the dorsum of the hand and not on the palmar. The veins of the hand are present on the dorsum on the hand, obviously due to the fact that the surface is not subjected to the pressure and the lax character of the skin of the dorsum allows free dilatation of the veins. Muscles of the thenar eminence are supplied by the median nerve and the muscles of the hypothenar eminence are supplied by the ulnar nerve. A larger elevation on the lateral side of the palm is known as thenar eminence, which is more prominent than its counterpart on the medial side the hypothenar eminence. All the four fingers lie in one plane while the thumb is isolated from the fingers and has undergone rotation of 90 degrees. There are eight carpal bones arranged in proximal and distal rows, presenting gentle concavity on the anterior side.
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