Lab_7_Upper Extremity Musculature - Copy

Lab_7_Upper Extremity Musculature - Copy - Lab 7 FUNCTIONAL...

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Lab 7 1 FUNCTIONAL HUMAN ANATOMY LAB #7 UPPER EXTREMITY MUSCULATURE The following tips will help you in naming the muscles of the forearm and hand: MUSCULATURE: BACK/UPPER EXTREMITY: Medial attachment: Lateral attachment: Medial attachment: posterior surface on inferior angle of scapula Lateral attachment: The Ulna is located on the pinky side of the wrist, the Radius is located on the thumb side of the wrist. This will be maintained regardless of hand position (pronated vs. supinated). The anterior side of the forearm and the palmar side of the hand contain muscles that perform flexion and may have flexor in the name. The posterior side of the forearm and the dorsal side of the hand contain muscles that perform extension and may have extensor in the name. Most muscles in the anterior forearm originate or appear to originate from the medial epicondyle of the Humerus. Most muscles in the posterior forearm originate or appear to originate from the lateral epicondyle of the Humerus. Any muscle that attaches to the 1 st digit (thumb) has Pollicus in the name Any muscle that attaches to the 2 nd digit (index finger) has Indicis in the name Any muscle that attaches to the 5 th digit (pinky finger) has Digiti Minimi in the name Any muscle that attaches to all of the digits (2-5) has Digitorum in the name Radialis muscles perform radial deviation Ulnaris muscles perform ulnar deviation Latissimus Dorsi may occasionally have some attachment along the inferior angle of the scapula thoracolumbar fascia (spinous processes of inferior 6 thoracic vertebre and all lumbar vertebre, iliac crest) and inferior 3 or 4 ribs floor of interturbicular (bicipital) groove Function: Adduction or extension of the Arm at the Shoulder. Internal rotation of the arm at the shoulder Teres major synergistic with latissimus dorsi medial ridge of interturbicular groove Function: same as Latissimus Dorsi
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Lab 7 2 Medial attachment: Lateral attachment: superior facet on greater tubercle of humerus Medial attachment: Lateral attachment: middle facet on greater tubercle of humerus Function: External rotation of the arm at the shoulder Medial attachment: lateral border of scapula Lateral attachment: inferior facet on greater tubercle of humerus Function: External rotation of the arm at the shoulder Medial attachment: Lateral attachment: lesser tubercle of humerus Function: Internal rotation of the arm at the shoulder Supraspinatus one of 4 rotator cuff muscles; primarily concerned with maintaining the position of the humeral head in the glenoid fossa; counterbalances forces placed on the joint externally and by other muscles acting on the joint. supraspinous fossa of scapula Function: Abduction of the arm at the shoulder. Only effective during the first 80 degrees (approx.) of adduction Infraspinatus one of 4 rotator cuff muscles; primarily concerned with maintaining the position of the humeral head in the glenoid fossa; counterbalances forces placed on the joint externally and by other muscles acting on the
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Lab_7_Upper Extremity Musculature - Copy - Lab 7 FUNCTIONAL...

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