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Pectinate muscles make up the part of the wall in front of this, the right atrial appendage. [citation needed] In the left atrium, the pectinate muscles are confined to the inner surface of its atrial appendage. [1] They tend to be fewer and smaller than in the right atrium.
The crista terminalis provides the origin for the pectinate muscles. [citation needed] The sinoatrial node is located in the superior part of the crista terminalis at the junction of the right atrium, and superior vena cava. [2]: 60
It connects to the pectineus muscle on its ventral and superior aspects. [1] It connects to the rectus abdominis muscle, and the abdominal internal oblique muscle, of the anterior abdominal wall. [1] The pectineal ligament is usually around 6 cm long in adults. [2] It is close to the major vasculature of the pelvis, including external iliac ...
Musculi pectinati of the heart, also known as pectinate muscles; Pectineus muscle, an adductor of the thigh; Pectineal line (femur) Pectineal line (pubis), also known as the pecten pubis; Pectineal ligament, or Cooper's Ligament, located along the pecten pubis
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Pectinate may refer to: Pectinate line , a line which divides the upper two thirds and lower third of the anal canal Pectinate muscles , parallel ridges in the walls of the atria of the heart
The pectineus muscle arises from the pectineal line of the pubis and to a slight extent from the surface of bone in front of it, between the iliopectineal eminence and pubic tubercle, and from the fascia covering the anterior surface of the muscle; the fibers pass downward, backward, and lateral, to be inserted into the pectineal line of the femur which leads from the lesser trochanter to the ...
The terminal sulcus is a groove on the outer surface of the right atrium of the heart marking the transition between the sinus venarum cavarum (which has a distinct embryological origin) and the rest of the right atrium (which features pectinate muscles on its inner surface).