Hand Anatomy Base Of Thumb

Innervation deep branch of ulnar nerve. Also known as the broad palm or metacarpus it consists of the area between the five phalanges finger bones and the carpus wrist joint. This tendon also travels along the back of the thumb and helps straighten the thumb but it connects the muscle in the back of the forearm to the bone at the tip of the thumb.

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Anatomical Illustration Of The Muscles Of The Hand That Control The Thumb Hand Therapy Muscle Anatomy Massage Therapy

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It is more common in women though certainly men can develop this type of problem.

Hand anatomy base of thumb. Function thumb abduction moving away from the hand at carpometacarpal joint 1. Two very important ligaments are the dorsoradial and the volar beak ligaments.

The thumb metacarpal can bend and extend the thumb move the thumb away from and toward the hand and spin the thumb on the trapezium. This white shiny material has a rubbery consistency.

The ip joints of the digits also work like hinges when you bend and straighten your fingers and thumb. Digits that extend from the palm of the hand the fingers make it possible for humans to grip the smallest of objects.

Thumb arthritis is the second most common type of arthritis in the hand. But there s a third bone in the fleshy part of your hand known as the metacarpal.

The thumb cmc joint has the most freedom of motion. Thumb arthritis is also known as basal joint arthritis.

The thumb is the first of the hand s five digits but it is typically not referred to as a finger. Origin palmar base of third metacarpal transverse head capitate bone and palmar bases of second and third metacarpals oblique head insertion base of proximal phalanx ulnar sesamoid bone.

This is the. The abductor pollicis longus and brevis help move the thumb away from the hand.

Examine your thumb and you ll feel two bones known as phalanges. The palm comprises the underside of the human hand.

The joints of the hand fingers and thumb are covered on the ends with articular cartilage. The thumb only has one ip joint between the two thumb phalanges.

Anatomy of the thumb. The medical latin english noun for thumb is pollex compare hallux for big toe and the corresponding adjective for thumb is pollical.

The thumb is the first digit of the hand when a person is standing in the medical anatomical position where the palm is facing to the front the thumb is the outermost digit. The hand can be considered in four segments.

The most prevalent hand arthritis involves the last joint in each finger. The thumb possesses a unique and wide range of motion not shared by the hand s other digits.