What is the abduction and adduction of thumb?

What is the abduction and adduction of thumb?

… addition, the abduction/adduction of the thumb occurs at the metacarpophalangeal and trapeziometacarpal joints [19]. Figure 4 shows that flexion/extension motion of the thumb occurs in a plane parallel to the palm, while abduction/adduction motion of the thumb occurs in a plane perpendicular to the palm [21]. …

What movements are possible at the carpometacarpal joint of the thumb?

The primary motions at the CMC joint are palmar abduction and adduction, which occur about the joint’s medial- lateral axis, and flexion and extension, which occur about the joint’s anterior-posterior axis.

What is thumb CMC abduction?

1. The thumb’s MP and CMC joints abduct and adduct in a plane perpendicular to the palm. Some therapists also refer to abduction as “palmar abduction.”

What type of joint is the Carpometacarpal of the thumb?

saddle joint
The carpometacarpal (CMC) of the thumb is a saddle joint that permits a wide range of motion and is largely responsible for the characteristic dexterity of human prehension. This joint, located at the very base of the thumb, is subject to large physical stresses throughout life.

What’s abduction and adduction?

Abduction and adduction are terms that refer to certain body motions or movements. Abduction is the opposite of adduction. With abduction, limbs (arms, legs or fingers) are moved away from your body’s midline. Adduction, however, refers to moving your limbs closer to the midline.

What is joint abduction?

Abduction – movement away from the midline of the body. This occurs at the hip and shoulder joints during a jumping jack movement. Adduction – movement towards the midline of the body. This occurs at the hip and shoulder, returning the arms and legs back to their original position from a jumping jack movement.

Is the carpometacarpal joint a hinge joint?

The carpometacarpal (CMC) joints are five joints in the wrist that articulate the distal row of carpal bones and the proximal bases of the five metacarpal bones….

What is the metacarpal phalangeal joint?

The metacarpophalangeal joint or MP joint, also known as the first knuckle, is the large joint in the hand where the finger bones meet the hand bones. The MCP joint acts as a hinge joint and is vital during gripping and pinching. When arthritis affects the MP joint, the condition is called MP joint arthritis.

What are the Arthrokinematics of the first carpometacarpal joint during abduction?

FIGURE 8-16. The arthrokinematics of abduction of the carpometacarpal joint of the thumb. Full abduction stretches the anterior oblique ligament (AOL), the intermetacarpal ligament (IML), and the adductor pollicis muscle. The axis of rotation is depicted as a small circle at the base of the metacarpal.

What is thumb adduction?

While adduction of the thumb (bringing it back into the plane of the palm of the hand from its previously abducted position) is mainly produced by the adductor pollicis, it can also bring the thumb to the side of the palm and index finger and the flexor pollicis brevis and the opponens pollicis help in thumb adduction.

Where is carpometacarpal joint?

The carpometacarpal (CMC) joints of the hand form the articulation between the distal row of carpal bones and the bases of the five metacarpal bones. These joints are positioned at the extreme proximal region of the hand (see Figs. 7.3 and 7.4).