"origin: posterior surface of the distal humerus"
"insertion: posterior surface of the elbow joint capsule"
"innervation: radial nerve"
"action: tenses the posterior elbow joint capsule during elbow extension"
"origin: posterior surface of the distal humerus"
"insertion: posterior surface of the elbow joint capsule"
"innervation: radial nerve"
"action: tenses the posterior elbow joint capsule during elbow extension"