Portions

The delta muscle can be subdivided with humans into three parts:

• Pars clavicularis (key leg part)
• Pars scapularis (shoulder sheet part)
• Pars acromialis (fishbone-hit a corner-hurry)

With many mammals the clavicle is not regressed and therefore the Pars clavicularis trained. With animals without Acromion (e.g. Horse, pig) is missing also the Pars acromialis.

Function

The Deltoideus pulls the arm up to the right angle upward with its middle fibers. The front fibers pull the arm forward (inflection or Anteversion) and turn it inward (medial), the rear fibers however pull the arm to the rear (Extension or Retroversion), and turn it outward (laterally). Around the arm over the horizontal the upper portion of the Musculus will lift trapezius used.

With the four-legged mammals the muscle works as Beuger of the shoulder joint.

Articles in category "Musculus deltoideus"

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