warlooki.blogg.se - Abduction movement

The different parts of the object do not move the same distance.

Angular motions (or rotary motions) occur when an object is around another object increasing or decreasing the angle.

Rectilinear motion is motion in a straight line between two points, whereas curvilinear motion is motion following a curved path.

Linear motions (or translatory motions), which move in a line between two points.

Īpart from this motions can also be divided into:

Rotational motions move a structure in a rotational motion along a longitudinal axis, such as turning the head to look to either side.

Angular motions occur over synovial joints and causes them to either increase or decrease angles between bones.

Gliding motions occur between flat surfaces, such as in the intervertebral discs or between the carpal bones of the wrist, and the metacarpal bones of the hand.

Motions can be split into categories relating to the nature of the joints involved: Motions are classified after the anatomical planes they occur in, although movement is more often than not a combination of different motions occurring simultaneously in several planes.

3.1.2 Flexion and extension of the hand.

3.1.1 Flexion and extension of the foot.

Many anatomical terms derive from Latin terms with the same meaning. Other terms, such as elevation and depression, describe movement above or below the horizontal plane. Rotational motion may occur at other joints, for example the shoulder, and are described as internal or external. Flexion and extension are examples of angular motions, in which two axes of a joint are brought closer together or moved further apart. In general, motion is classified according to the anatomical plane it occurs in.

Anatomists and others use a unified set of terms to describe most of the movements, although other, more specialized terms are necessary for describing unique movements such as those of the hands, feet, and eyes. The terminology used describes this motion according to its direction relative to the anatomical position of the body parts involved. Motion includes movement of organs, joints, limbs, and specific sections of the body. Froment sign = inability to pinch paper between thumb and index finger without bending of the thumb → indicates ulnar nerve palsy affecting adductor pollicis. Patient utilizes flexor pollicis longus.Motion, the process of movement, is described using specific anatomical terms.Adducts the thumb at the 1st CMC joint (i.e., from the abducted position, moves the thumb posteriorly back toward the palm).Right: Wartenberg sign note the abducted positioning of the 5th finger. The net result is the extensor digiti minimi remains unopposed, with the abduction positioning favored. There is also attenuated function of the abductor digiti minimi (also ulnar nerve), but the effect of loss of adduction function of palmar interossei is more significant in pinky position. Wartenberg sign → ulnar nerve palsy resulting in attenuated function of palmar interossei → loss of pinky adduction component → pinky’s normal position is more abducted.Note that the pinky is adducted by the palmar interossei, but it is not abducted by the dorsal interossei the abductor digiti minimi abducts the pinky.Adduct the pinky, ring, middle, and index fingers (i.e., the pinky, ring, and index movement toward from the middle finger.Movement of the middle finger medially is referred to as ulnar abduction movement of the middle finger laterally is referred to as radial abduction. Should be noted that the middle finger has two dorsal interossei attachments and no palmar interossei attachments.PAD DAB– mnemonic for memorizing actions of dorsal vs palmar interosseous functions – Palmar ADduction, Dorsal ABduction.Innervated by deep branch of ulnar nerve.Insert on the proximal phalanges and extensor expansions (specialized connective tissue).

Abduct the ring, middle, and index fingers (i.e., the ring and index movement away from the middle finger + the middle finger movement radially).Innervated by the deep branch of ulnar nerve.Enables grasping of large objects while the fingers are outstretched.Abducts the pinky at the 5th carpometacarpal joint.