Toes and fingers are moved closer together by contraction of the adductor muscles.Īdductor muscles generally have a longer average muscle fiber length when compared with an abductor muscle. What is Adduction? Definition of Adduction:Īdduction refers to the movement of structures or limbs towards the middle of the body by the contraction of adductor muscles. The dorsal interossei bring about some abduction of the toes. Abductors of the foot:Ībductor movement of the big toe is brought about by the abductor hallucis and movement of the little toe is brought about by the digiti minimi pedis. Any weakness of abductor muscles that are found in the hip region can cause an abnormal gait. Abductor muscles found in the hip region contract to produce a lateral movement of the pelvic region of the body. Abduction muscles allow you to move your legs sideways, and also function in stabilizing the hip joint. The gluteus medius is the larger of these two muscles and is very important in keeping the hip stable during walking. They include the following muscles: gluteus minimus and gluteus medius which are found in the gluteal region. These muscles are often called abductors of the hip. The supraspinatus is attached to the shoulder blade (scapula) and the upper arm bone (humerus). The deltoid muscle covers the shoulder region. Part of the deltoid muscle is responsible for abduction of the arm, as is the supraspinatus muscle. The dorsal interossei are muscles found between the long bones that bring about abduction of the fingers. The abductor pollicis longus, as the name implies, is a long muscle that attaches to the bones of the forearm and thumb. For instance, abductor pollicis brevis and abductor pollicis longus which are two muscles acting on the thumb, causing the abduction of the thumb. Some are even partly named for the action they perform. There are many examples of abductor muscles in the human body. It has been found that abductors usually have a shorter muscle fiber length (in general) than an adductor muscle. The physiological function of a muscle is related to fiber length and cross-sectional area. Anatomical structure involved in Abduction : Toes and fingers are pulled apart by contraction of the abductor muscles. What is Abduction? Definition of Abduction :Ībduction refers to the movement of structures or limbs away from the middle of the body by the contraction of abductor muscles.
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