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Intrinsic muscles



A group of muscles located within or situated deeper in a structure, in contrast to extrinsic muscles located rather superficially


Based on the above definition, the intrinsic muscles refer to the muscles closest to the axial and appendicular skeleton. For example, the intrinsic muscles of the hand are those lying deeper in the hand, such as the interossei and lumbrical muscles.

In another view, the intrinsic muscles of the tongue pertain to the muscles within the tongue with their insertions and origins within the tongue as well. Intrinsic muscles of the tongue include the superior longitudinal muscle, the inferior longitudinal muscle, the transverse muscle, and the veticalis muscle.


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Evolving non "life-or-death" but useful characteristics

... might be just a by product of a mechanism that acts on all the smooth muscles. Or more generally, some things are selected not because they have any intrinsic value, but because they are part/respond to a wider mechanism that cannot be easily ...

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by canalon
Thu Jul 05, 2012 3:18 am
Forum: Evolution
Topic: Evolving non "life-or-death" but useful characteristics
Replies: 5
Views: 5142

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