Actions of the Triceps Brachii Muscle Long Head: a. Where as supination is a fancy way of saying external rotation at the wrist (palms facing forward in anatomical position) now even though neither of these positions can effect the insertion point on the Ulna, it can however, effect the ease in which the shoulder can externally rotate. Before we get started I want to break down the anatomy of the triceps. This creates a confusion, because the term insertion … But what many people don’t know is when the shoulder is externally rotated the long head of the triceps acts in the motion of shoulder adduction. My advice is to use both the biceps and the triceps charts in a very general, non- … This explains the “reverse grip bench press”. Overhead extensions won't completely isolate the long head, but they do place the majority of the load on the long head, leaving the other two heads of the triceps playing supporting roles. You often see a back and forth in the gym when it comes to hand position and tricep extensions. Required fields are marked *. But… we must remember that the triceps are a biarticulate muscle- meaning it is responsible for movement at both the elbow and the shoulder. save. Technically they’re both right, hand position is merely an expression of the radius’s juxtaposition with the ulna, the ulna’s proximal prominence aka the olecranon process is unaffected by the radius position so in that sense it doesn’t matter if we are talking in reference to the motion of pure elbow extension. In a supinated position the shoulder can move into external rotation with greater ease due to the fact that supination is already suggestive of external rotation. Radial nerve. i have long arms and legs and a short torso. 05-29-2008, 10:37 PM #3. cheece2001. With that in mind I’m going to answer this the way I answer 99.99% of questions that I get asked. Triceps: the long and short of it Posted By : Jordan / 0 comments / ... now even though neither of these positions can effect the insertion point on the Ulna, it can however, effect the ease in which the shoulder can externally rotate. (on the other arm is obvious that it’s short but on this one i have no clue) i already have mid shirt biceps and a short triceps these shitty insertions really demotivates me i was so in to lifting before i knew about long and short insertions. Long head – originates from the infraglenoid tubercle ... Insertion: Distally, the heads converge onto one tendon and insert into the olecranon of the ulna. The triceps extends the elbow and also extends the shoulder; this is more or less common knowledge. A common exercise used by powerlifters and bodybuilders alike- the reverse grip which they are referring to is actually a supinated grip, again: suggestive of external rotation which allows for the long head of the triceps to fill its tertiary role as a shoulder adductor.