Supinator

Examples of Supinator in the following topics:

• Muscles of the Humerus that Act on the Forearm

  • Action - Supination of the forearm.
  • Supinator - The supinator is located in the deep region of the forearm posterior compartment.
  • Attachments - The supinator has two heads: one originating from the humerus, the other from the ulna.
  • The biceps brachii is located in the anterior compartment of the upper arm and flexes and supinates the forearm at the elbow.

• Stability and Range of Motion at Synovial Joints

  • Certain joints exhibit special movements including elevation, depression, protraction, retraction, inversion, eversion, dorsiflexion, plantar flexion, supination, pronation, and opposition.

• Muscles of the Wrist and Hand

  • Supinator - The supinator is located in the deep region of the forearm posterior compartment.
  • Attachments - The supinator has two heads: one originates from the humerus, the other from the ulna.
  • Abductor Pollicis Longus – The abductor pollicis longus is situated immediately distal to the supinator muscle.

• Anatomical Position

  • The basis for the standard anatomical position in humans comes from the supine position used for examining human cadavers during autopsies.

• Tennis Elbow, Little-League Elbow, and Dislocation of the Radial Head

  • This causes significant pain, partial limitation of flexion/extension of the elbow, and total loss of pronation/supination in the affected arm.
  • While applying compression between these two hands, the forearm of the patient is gently supinated and the arm flexed.

• Nephroptosis (Floating Kidney)

  • Diagnosis is confirmed during intravenous urography, by obtaining erect and supine films.

• Sudden Infant Death Syndrome (SIDS)

  • Infants sleeping prone or exposed to tobacco smoke are at greater risk than infants sleeping supine or unexposed to tobacco smoke, respectively.

• Peptic Ulcer Disease

  • Therefore, gas in the peritoneal cavity, shown on an erect chest x-ray or supine lateral abdominal x-ray, is an omen of perforated peptic ulcer disease.

• Assessing CNS Disorders

• Pericarditis

  • Substernal or left precordial pleuritic chest pain with radiation to the trapezius ridge (the bottom portion of scapula on the back), which is relieved by sitting up and bending forward and worsened by lying down (recumbent or supine position) or inspiration (taking a breath in), is the characteristic pain of pericarditis.