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Sep 7, 2024 · Flexion refers to a movement that decreases the angle between two body parts. Flexion at the elbow is decreasing the angle between the ulna and the humerus. When the knee flexes, the ankle moves closer to the buttock, and the angle between the femur and tibia gets smaller.
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- Introduction
- Planes
- Axes
- Flexion and Extension
- Abduction and Adduction
- Elevation and Depression
- Internal and External Rotation
- Circumduction
- Pronation and Supination
- Dorsiflexion and Plantarflexion
The movements produced at joints by muscles are given specific anatomical names, often referred to as “anatomical terms of motion”. We usually make the assumption that the body is in normal resting anatomical position, and that joint movement occurs from this resting position. In this article, we explore the difference between an axis and a plane, ...
There are several different planesthat we use to describe the body and movements. There are three major planes.
There are also several different axeswe use to describe the movement of a joint. It is useful to think of an axis as a metal pole, and the joint rotating around this pole.
When talking about flexion and extension, we are usually referring to these movements as they occur about the coronal axis, and along the sagittal plane. Flexion refers to decreasing a joint angle, and extension to increasing the joint angleback to resting anatomical position.
Abduction and adduction refer to movements made about a sagittal axis and along the coronal plane. Abduction is moving a body part away from its resting anatomical position in the coronal plane; adduction is returning it to its normal resting position(includes ‘hyperadduction’).
Elevation refers to lifting, and depression refers to lowering. These movements only occur in several regions of the body and are a result of movement along the coronal plane.
Rotationrefers to movements made about the longitudinal axis and in the transverse plane. Internal rotation is rotating a joint towards the midline and external rotationis rotating a joint away from the midline.
Circumduction is a compound movement that occurs only at ball and socket joints, which can perform multiple movement types. As Figure 23, it is a combination of: 1. Flexion and extension 2. Abduction and adduction 3. Rotation Circumduction is described as a circular motion utilising each of these movements at different parts of the circular motion....
Pronation and supinationoccur at pivot joints. The most important example of this is the radiohumeral joint and the union of the radius and ulna through the interosseous membrane. To remember pronation, think of lying prone (on your belly). Thus, pronation of the radiohumeral joint refers to the palm of the hand facing the ground. To remember supin...
The foot is a little special and has four movements specific to it. The first two, dorsiflexion and plantarflexion, refer to the way the foot moves about the coronal axis and along the sagittal plane. Dorsiflexion brings the dorsum (back) of the foot back toward the tibia, so the toes are beginning to point towards the sky. This is a position of hi...
Nov 23, 2022 · Introduction. The location of body parts and associated pathology can be difficult to describe without specific anatomical terminology. The universal descriptions allow for a standardised reference point for referring to structures, which provides precision and reduces room for medical error or ambiguity. 1,2.
For example, the elbow flexes when performing a biceps curl. Extension – straightening a joint. This occurs when the angle of a joint increases, for example, at the elbow when putting a shot.
Most joints contain a single articulation. Each articulation contains the names of two bones (or sockets). For example, the hip joint is known as the acetabulofemoral joint since it is where the acetabulum ("acetabulo-") of a coxal bone articulates with the head of the femur ("-femoral").
Jun 12, 2022 · Biology definition: Anatomy is the study of the structure of the body of an organism. It is the branch of biology that focuses on the bodily structure of living things. It is subdivided into two: (1) gross anatomy (or macroscopic anatomy) and (2) microscopic anatomy.
angle. Sharp bony angulations which may serve as bony or soft tissue attachments. Examples: superior, inferior, and acromial angles of the scapula; superior, inferior, lateral angles of the occipital bone; angle of the mandible. body. Usually refers to the largest most prominent segment of bone.
