Hello Roflguy,

Traction epiphysis

The regions of the long bone which are non-articular, i.e. not involved in joint formation. Unlike pressure epiphyses, these regions do not assist in weight transmission. However, their proximity to the pressure epiphysis region means that the supporting ligaments and tendons attach to these areas of the bone. Traction epiphyses ossify later than pressure epiphyses. Examples of traction epiphyses are tubercles of the humerus (greater tubercle and lesser tubercle), and trochanters of the femur (greater and lesser)

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Hello ,

Traction Epiphysis :

Present at the ends of bones and develop due to traction by the attached muscles( and are therefore extracapsular), for example  greater tubercles in humerus and greater trochanter in females.

• These epiphyses ossify later than pressure epiphyses
• Mastoid process is another example of traction epiphysis.