Coiters muscle, also known as the ischiocavernosus muscle, is a small skeletal muscle located in the perineum, which is the region between the genitals and anus. It forms part of the urogenital diaphragm, a sheet of muscles that supports the pelvic organs.
The coiters muscle arises from a bony prominence called the ischial tuberosity, which is the lower part of the pelvis. It extends forward and splits into two parts on either side of the midline. Each portion then inserts into the crura of the penis in males and the clitoris in females.
The primary function of the coiters muscle is to assist in sexual activity. During sexual arousal, it contracts, causing the clitoral or penile erection by squeezing blood into the respective organs. This muscle also contributes to the rigidity of the erect penis or clitoris, helping maintain the blood-filled state.
In addition to its role in sexual function, the coiters muscle also aids in urinary control by compressing the urethra, preventing the leakage of urine. Furthermore, it plays a role in stabilizing the position of the pelvic organs, contributing to continence.
Overall, the coiters muscle is an essential component of the urogenital diaphragm, providing support and control for urinary and sexual functions in both males and females.
