flexion

(noun)

The act of bending a joint. The counteraction of extension.

Related Terms

  • Flexor Carpi Ulnaris
  • Flexor Carpi Radialis
  • Flexor Digitorum Profundus
  • Flexor Digitorum Superficialis
  • Flexor Pollicis Longus
  • Pronator quadratus
  • Levers can also vary based on the relative position of the load, pivot, and point of force application.
  • Palmaris Longus
  • synovial joint
  • Pronator teres
  • Pronator quadraturs
  • Flexion
  • extensors
  • Abduction
  • adduction
  • third-class lever
  • second-class lever
  • first class lever
  • abduction
  • rotation
  • Brachioradialis
  • Supinator
  • Pronator Quadraturs
  • Pronator Teres
  • Triceps Brachii
  • Biceps Brachii
  • origin
  • insertion
  • extrinsic muscles
  • extension
  • flexor
  • extensor

(noun)

Reduces the angle between two body parts.

Related Terms

  • Flexor Carpi Ulnaris
  • Flexor Carpi Radialis
  • Flexor Digitorum Profundus
  • Flexor Digitorum Superficialis
  • Flexor Pollicis Longus
  • Pronator quadratus
  • Levers can also vary based on the relative position of the load, pivot, and point of force application.
  • Palmaris Longus
  • synovial joint
  • Pronator teres
  • Pronator quadraturs
  • Flexion
  • extensors
  • Abduction
  • adduction
  • third-class lever
  • second-class lever
  • first class lever
  • abduction
  • rotation
  • Brachioradialis
  • Supinator
  • Pronator Quadraturs
  • Pronator Teres
  • Triceps Brachii
  • Biceps Brachii
  • origin
  • insertion
  • extrinsic muscles
  • extension
  • flexor
  • extensor

Examples of flexion in the following topics:

  • Dermatomes

  • Movement at Synovial Joints

    • Flexion, or bending, occurs when the angle between the bones decreases.
    • Moving the forearm upward at the elbow or moving the wrist to move the hand toward the forearm are examples of flexion.
    • In extension, the opposite of flexion, the angle between the bones of a joint increases.
    • Straightening a limb after flexion is an example of extension.
    • (a)–(b) Flexion and extension motions are in the sagittal (anterior–posterior) plane of motion.
  • Synovial Joint Movements

    • Flexion is bending the limbs (reduction of angle) at a joint.
  • Stability and Range of Motion at Synovial Joints

    • During the last portion of the stride, as the foot undergoes plantar flexion (pointing the toes downward), the stored elastic energy is released.
    • Certain joints exhibit special movements including elevation, depression, protraction, retraction, inversion, eversion, dorsiflexion, plantar flexion, supination, pronation, and opposition.
  • Fourth Week of Development

    • The fourth week of gestation is characterized by the flexion of the superior portion of the neural tube to create the mesencephalon.
  • Types of Synovial Joints

    • These joints act as a hinge, allowing flexion and extension in just one plane.
    • Some classifications make a distinction between condyloid and ellipsoid joints, but both allow flexion, extension, abduction, adduction, and circumduction movements.
  • Functional Classification of Joints

  • Muscles of the Shoulder

    • Actions – The anterior region assists the pectoralis major during transverse flexion of the shoulder and acts weakly in strict transverse flexion.
    • The lateral region assists in shoulder flexion when the shoulder is rotating, although it also assists the transverse abduction of the shoulder.
  • Lever Systems

    • Flexion decreases the angle and extension increases the angle.
    • For example, extension of the arm opens the angle of the elbow joint, while flexion allows for the bending of the arm.
    • Flexion can also move inwards towards the body or forward, such as with hips or shoulders.
  • Muscles of the Humerus that Act on the Forearm

    • Humerus that act on the forearm are primarily involved in flexion and extension.
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