Question

A) The force of the tennis ball will have a tendancy to want to create what sagittal plane motion at the wrist?

B) Which muscles of the wrist/forearm will work to oppose the sagittal plane motion created by the force of the tennis ball?

C) Which muscles of the wrist/forearm would have to activate to oppose the strong finger flexion and wrist flexion torque created with a strong gripping activity as needed when holding a tennis raquet?

D) The muscles identified in questions 3 and 4 for this particular patient have become very tight because of the overuse during tennis. Describe one stretching exercise that can be used, in addition to the orthosis, to support the recovery of this patient. Include the body position and the parameters of this stretch.

Answer 1

A. Wrist joint is ellipsoid joint allows movements along two axes transverse and sagittal. Flexion in the radioulnar joint is described as the movement in which palmar aspect of hand moves towards the forearm in sagittal plane.While playing tennis we observe felxion and extension of wrist joint.

B..Muscles at wrist joint helps for movements are Flexor carpi ulnaris ,flexor carpi radials these muscles help in flexion with assistance from the flexor digitorum superficialis. Extensor carpi radialis longus and brevis and extensor carpi ulnaris, with assistance from extensor digitorum helps in extension movement. Muscles helps in extension will oppose the flexion movement.

C.Extensor carpi radialis longus and brevis has to activate to oppose the movement of flexion at wrist and thumb.

D.With the elbow fully extended or locked out, place the back of hand upon the wall and twist the wrist into ulna deviation (Adduction movement). Squat down at the knees to increase the intensity of the stretch