1. What are the functional implications of an adhesion between the head of the radius and the annular ligament?

2. A subject demonstrates weakness in elbow flexion. How you would differentiate between weakness in the biceps, brachialis and brachioradialis by positioning the patient and upper extremity to emphasize one muscle over the others.

3. Position the subject’s upper extremity to stretch the brachialis muscle without interference from a possibly tight biceps muscle.

4. Position the subject’s upper extremity to put the long head of triceps on maximal stretch. How did you determine that the long head was actually on maximal stretch?

5. Place the subject’s upper extremity so that:

6. Demonstrate the movement of the glenohumeral and humeroulnar joints that will allow the biceps to flex the elbow with maximum strength through the largest possible range.

7. What muscle(s) could serve as a neutralizer for the biceps when you flex the forearm at the elbow with the forearm in pronation?

8. Perform an active extension of the humerus at the shoulder in a fashion that will allow the triceps to assist with the movement with the greatest active tension possible through the largest range of motion possible.

1. Have your lab partner firmly grip your index and middle fingers with your wrist joint in a neutral position. Perform a maximum contraction of your finger flexors.

Repeat the same task, but with the wrist in a position of extreme extension.

In which position could you perform the strongest contractions, the weakest, and why?

2. Review the musculotendinous anatomy of the Flexor Digitorum Profundus and Superficialis. What is their primary structural difference?

Place the back of your right hand on the table and immobilize the right ring finger in complete MCP, PIP and DIP extension with your left hand, while you flex your right index, middle and little MCPs. Try to flex your right index, middle and little PIPs in the position. What happened at the PIPs?