Thursday, December 1, 2011

Landmark Sightings, Part 1: Bruce Lee

We just finished the arm portion of my fall anatomy classes, so I thought I'd get Bruce to help me with a little recap. First the image with some muscle overlays. Not a great deal of detail here-- just the basic shapes.

Behold Bruce, a fine source of landmark sightings. Click for a full view if necessary.

Now the image with labels but without the muscle overlay:

Worth noting: Muscle striations can be seen in the deltoid muscle. The extensor carpi radialis longus muscle bulges out more than any other on the forearm, so it's casting a deeper shadow than the rest. Extensor digiti minimi, a very thin muscle that extends the pinky finger, can be seen clearly between extensor digitorum and extensor carpi ulnaris. On the anterior upper arm, the cephalic vein can be seen popping out on the biceps brachii muscle, which it runs over just before entering the deltoid furrow, a crease between the deltoid and pectoralis major muscles. On the posterior upper arm, the division between the lateral and longs heads of the triceps muscle also shows clearly. This isn't usually the case, but Bruce is quite defined!

Image courtesy Thanks!


  1. Perfect timing-I'll show this to my students next week!

  2. The head of Bruce Lee's extensor carpi ulnaris is so defined that it can be seen divided in two.