Pectinate muscles

Pectinate muscle Definition

It refers to any of the special intracardiac muscles or prominent atrial myocardium ridges. This physical structure gets its name from the fact that the muscular fibers located in it are arranged like the bristles of a comb.

It is also known by other names like Musculus pectinatus and Músculo pectinate.

Pectinate muscle Location

It is mainly located in the right atrium. It can be found more in the right atrial appendage and less in the left atrium. These muscles may also traverse the wall of the adjacent anterior atrium.

Pectinate muscle Function

The wave like pattern of fibers of this muscle allows stronger contraction with minimum muscle mass. These muscles restrict and regulate the displacement of cusps of cardiac valves beyond the maximum point of distention.

Pectinate muscle Pictures

Take a look at some of the carefully chosen pictures of Pectinate muscle to know how it actually looks like.

Picture of Pectinate muscle

Picture 1 - Pectinate muscle

Image of Pectinate muscle

Picture 2 - Pectinate muscle Image

 

References:

http://dictionary.reference.com/browse/pectinate%20muscle

http://drsvenkatesan.wordpress.com/2011/08/28/what-is-the-function-of-pectinate-muscles-of-heart/

http://faculty.ucc.edu/biology-potter/heart.htm

 

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