The human hand, which is the most distal portion of the upper limb, is an engineering and evolutionary marvel. It's strong enough for climbers to take on any mountain, but it's also precise enough for manipulating some of the world's tiniest things and performing complex activities.
The hand is made up of a variety of neurovascular systems that are accountable for drainage and transmission, as well as specific bones onto which certain muscles are linked. The intrinsic muscles of the hand, on the other hand, are only partially responsible for the entire range of motion of the hand. The forearm muscles, which send tendons towards the hand via an equally intricate and flexible anatomy known as the wrist, are the other significant contributors.
Abductor pollicis brevis, adductor pollicis, flexor pollicis brevis, and opponens pollicis make form the thenar group.
Abductor digiti minimi, flexor digiti minimi, opponens digiti minimi, palmaris brevis make up the hypothenar group.
Lumbircals, palmar interossei, and dorsal interossei are all part of the metacarpal group.
'Rule of Threes' as a mnemonic
Nerves:
The thenar muscles are primarily supplied by the median nerve and its branches (common and proper palmar digital nerves).
The radial nerve innervates the skin on the outside of the thumb.
The hypothenar and metacarpal groups are innervated by the ulnar nerve and its branches (superficial, deep, and dorsal).
Except for the LOAF muscles, the ulnar nerve supplies all intrinsic muscles of the hand (Lateral two lumbricals, Opponens pollicis, Abductor pollicis brevis, Flexor pollicis brevis)
Veins:
The primary drainage pathway of the hand is the dorsal venous network (also receiving palmar venous return via perforating veins). It is the source of the cephalic and basilic veins.
Venous arches of the palms: Palmar metacarpal and digital veins are received. The blood is drained into the radial and ulnar veins.
Arteries
The radial and ulnar arteries give rise to all of the branches. The palmar arches (superficial and deep), palmar digital arteries (common and proper), dorsal carpal arch, dorsal metacarpal arteries, dorsal digital arteries, and the thumb's major artery are among them.
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Answers & Comments
Answer:
Introduction
The human hand, which is the most distal portion of the upper limb, is an engineering and evolutionary marvel. It's strong enough for climbers to take on any mountain, but it's also precise enough for manipulating some of the world's tiniest things and performing complex activities.
The hand is made up of a variety of neurovascular systems that are accountable for drainage and transmission, as well as specific bones onto which certain muscles are linked. The intrinsic muscles of the hand, on the other hand, are only partially responsible for the entire range of motion of the hand. The forearm muscles, which send tendons towards the hand via an equally intricate and flexible anatomy known as the wrist, are the other significant contributors.
Hand Anatomy
Bones:
Muscles:
Nerves:
Veins:
Arteries
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