rotator cuff

Examples of rotator cuff in the following topics:

• Rotator Cuff Injury and Dislocated and Separated Shoulder

  • Rotator cuff tears are the most common conditions affecting the shoulder .
  • When shoulder trauma occurs, these functions can be attenuated, suggesting a rotator cuff tear .
  • The tears occur in one or more of the four tendons of the rotator cuff muscles.
  • The tendons of the rotator cuff, not the muscles, are most commonly torn.
  • Once a tear happens in the rotator cuff, it is much more likely to recur.

• Impingement Syndrome

  • Shoulder impingement syndrome occurs when the tendons of the rotator cuff muscles become irritated and inflamed.
  • The rotator cuff muscle tendons pass through a narrow space between the acromion process of the scapula and the head of the humerus.
  • Loss of function of the rotator cuff muscles, due to injury or loss of strength, may cause the humerus to move superiorly, resulting in impingement.
  • Ultrasonography, arthrography, and MRI can be used to detect rotator cuff muscle pathology .
  • Also damaged rotator cuff muscles can be surgically repaired.

• Muscles of the Shoulder

  • It retracts and rotates the scapula.
  • There are six intrinsic muscles, four of which form the rotator cuff.
  • The rotator cuff is a group of four muscles that pull the ball of the humerus into the shallow socket of the scapula, adding required stability.
  • The rotator cuff complex is composed of the supraspinatus, infraspinatus, subscapularis, and teres minor all of which originate from the scapula and connect to the humerus.
  • Muscles of the rotator cuff and presented with the triceps brachii.

• How Skeletal Muscles Produce Movements

  • The muscles of the rotator cuff are also synergists in that they fix the shoulder joint allowing the bicepps brachii to exert a greater force.
  • The brachioradialis and brachialis are synergist muscles, and the rotator cuff (not shown) fixes the shoulder joint allowing the biceps brachii to exert greater force.

• Humerus (The Upper Arm)

  • The four rotator cuff muscles attach to these tubercles, strengthening and maintaining the shoulder joint.

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

  • Disorders such as calcification of the rotator cuff, bicipital tendinitis, or carpal tunnel syndrome may increase chances of tennis elbow.

• Checking Circulation

  • This comprises an inflatable cuff placed around the upper arm at roughly the same vertical height as the heart, attached to a mercury or aneroid manometer.
  • A cuff of appropriate size is fitted smoothly and snugly, then inflated manually by repeatedly squeezing a rubber bulb until the artery is completely occluded.
  • Listening with the stethoscope to the brachial artery at the elbow, the examiner slowly releases the pressure in the cuff.
  • The cuff pressure is further released until no sound can be heard (fifth Korotkoff sound), at the diastolic arterial pressure.

• Muscles that Cause Movement at the Hip Joint

  • Actions – Extends of the thigh and assists with rotation.
  • The muscles of the lateral rotator group are deeply located and as the name suggests, act to laterally rotate the thigh at the hip.
  • Actions - Lateral rotation and abduction of the thigh at the hip.
  • Actions - Lateral rotation and abduction of the thigh at the hip.
  • Actions: Extends and laterally rotates at the hip.

• Measuring Blood Pressure

  • A blood pressure cuff and associated monitor used for determining systolic and diastolic pressures within an artery.

• Posterior Muscles

  • Actions – The superior region supports the arm and elevates and rotates the scapula, the intermediate region retracts the scapula, and the inferior region rotates and depresses the scapula.
  • Rhomboid Minor – Sits between the levator scapulae and rhomboid major, with which it is paired in action and function, this retracts and rotates the scapula.
  • Two muscles in the superficial layer are responsible for rotation of the head.
  • Two muscles in the deep layer are responsible for maintenance of posture and rotation of the neck.