Scheme of the longitudinal section of the long head of the biceps
In the longitudinal section we
differ four layers during normal circumstances:
 | derma and hypoderm |
| m. deltoideus |
| a passage of the tendon into the muscular substance caput longum of m. biceps brachii |
| humerus |
ultrasound picture and scheme of the long head of the
biceps in the longitudinal section
Layers are well differentiable.
A reality is worthy notice that a hyperechogenic line, which is between m.
deltoid and m. biceps, is only for a
passage of fibres of m. deltoideus to fibrous fibres, which surround the
bicipital groove and not only the tendon of the long head of the biceps, which
is found under this line.