The hands (med./lat.: manus, pl. manūs) are the two intricate, prehensile, multi-fingered body parts normally located at the end of each arm of a human or other primate. They are the chief organs for physically manipulating the environment, using anywhere from the roughest motor skills (wielding a club) to the finest (threading a needle); and since the fingertips contain some of the densest areas of nerve endings on the human body, they are also the richest source of tactile feedback. For this reason, the sense of touch is intimately associated with human hands. Like other paired organs (eyes, ears, legs), each hand is dominantly controlled by the opposing brain hemisphere, and thus handedness, or preferred hand choice for single-handed activities such as writing with a pen, reflects a significant individual trait.

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Superficial palmar branch of radial artery and recurrent branch of median nerve to thenar muscles.
Proper palmar digital nerves of thumb.
Fascia over adductor pollicis muscle.
Thenar space (deep to flexor tendons and 1st lumbrical muscle).
1st dorsal interosseous muscle.
Probe in dorsal extension of thenar space deep to adductor pollicis muscle.
Septum separating thenar from midpalmar space.
Common palmar digital artery.
Proper palmar digital arteries and nerves.
Annular and cruciform parts of fibrous sheath over (synovial) flexor tendon sheaths.
Insertion of flexor digitorum profundus tendon.
Insertion of flexor digitorum superficialis tendon.
Midpalmar space (deep to flexor tendons and lumbrical muscles).
5th finger (synovial) tendinous sheath.
Common flexor sheath (ulnar bursa).
Hypothenar muscles.
Common palmar digital branches of median nerve.
Ulnar artery and nerve.
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