The ECR & ECU are involved in tennis elbow injury. It becomes very tender to the touch on the elbow (lateral epicondylitis), which is a condition when the outer portion of the elbow becomes sore and tender. It is commonly caused by over use.
The extensor carpi radialis longus is one of the five main muscles that control movements at the wrist. This muscle, starts on the lateral side of the humerus, and attaches to the base of the second metacarpal bone aka index finger.
The extensor digiti minimi originates from the lateral epicondyle of the humerus, or the outer edge of the elbow if the palm is facing up, in the anatomical position. It runs along the back of the back of the arm to the wrist and past the wrist to the proximal phalanx V, or the bone between the genital knuckle and first bend of the finger of the little finger.
RX is always ice 30 minutes 2 – 3 x a day on the painful area. Take anti-inflammatory meds, stretch, and tape the shin and arch before any physical activity.