Both muscles arise from the adjacent anterior and posterior intermuscular septa
. Fibularis brevis muscle passes vertically down the leg and two to four centimeters proximal to the distal end of the fibula it tapers into a long flat tendon.
In the T2 weighted sequences, it shows high intensity in the involved muscle with diffuse enlargement of involved muscle groups and partial loss of normal fatty intermuscular septa
.The T1 weighted images show isointense or hypointense images.
The extensor digitorum muscle (EDM) originates from the lateral condyle of the humerus via the common extensor tendon, the adjacent intermuscular septa
and the antebrachail fascia (1,2).