Genital branch of genitor-femoral nerve (L1, L2): supplies anterior parts of labia. 4. Perineal branch of posterior cutanous nerve of the thigh: anterior part of labia & perineum. Origin: S2, 3, 4 segments. Course: as internal pudendal artery. Branches: *at its beginning: inferior hemorriodal nerve.
Somatic genital tract nerve supply: 1 Pudendal nerve. 2 Ilio-inguinal nerve (L1): supplies the skin of mons pubis. 3 Genital branch of genitor-femoral nerve (L1, L2): supplies anterior parts of labia. 4 Perineal branch of posterior cutanous nerve of the thigh: anterior part of labia & perineum.
Electrical representation of glanular innervation reveals the glans to be filled … The dorsal nerve of the penis innervates the glans, including the frenulum which is also innervated by a branch of the perineal nerve. Branches of the dorsal nerve of the penis extend through the glans ventrolaterally.
The perineal nerve innervates muscles of the perineum and pelvic floor: Levator ani muscles (including the iliococcygeus, pubococcygeus and puborectalis). The nerve also innervates the external urethral sphincter.
a) Ganglia primarily found in the head
This autonomic plexus is located anterior to the fifth lumbar vertebra and serves the pelvic viscera.
The autonomic nervous system is NOT involved in controlling
Lastly, the inferior rectal nerve will provide innervation to the perianal skin and the external anal sphincter.
The motor, sensory, and sympathetic nerve innervation of the external female genitalia originate from the pudendal nerve. The pudendal nerve is made up of the second, third, and fourth sacral spinal roots. The pudendal nerve will enter the pelvis via the lesser sciatic foramen.
The venous drainage of the external female genitalia is via the external and internal pudendal veins. The external pudendal vein will drain towards the great saphenous vein. The saphenous vein will drain back into the femoral vein. As the femoral vein ascends pass the inguinal ligament, it becomes the external iliac vein. While the internal pudendal vein drains back into the internal iliac vein. Both the external and internal iliac veins will ascend and merge to form the common iliac veins. The common iliac veins from both sides of the body will ascend to about the level of the fourth lumbar vertebra. At the level of the fourth lumbar vertebra, the common iliac veins merge to drain venous blood back into the inferior vena cava. The inferior vena cava will ascend towards the heart. Upon reaching the heart, the inferior vena cava drains its venous blood back into the right atrium.
If there is more estrogen, these structures tend to be larger and thicker. While the lack of estrogen can lead to the external genitalia being thinner and smaller.
The external female genitalia serves the purposes of reproduction and urination. The female external genitalia is fascinating due to the fact it is made up of both urinary tract and reproductive structures. These structures collectively fall under the term vulva. The definition of "vulva" is covering or wrapping.
The reason that these default structures differentiate into female external genitalia instead of males' is due to the influence of estrogen. If these structures were under the influence of testosterone, they would develop into male external genitalia. Blood Supply and Lymphatics.
The theca cells and granulosa cells within the ovaries produce sex hormones for females. The theca cells make androgens, and the granulosa cells take the androgen and convert it into estrogen. Estrogen is the dominant influence on the development of the female external genitalia.
The pudendal nerve is a major nerve in your pelvic region. This nerve sends movement (motor) and sensation information from your genital area. The pudendal nerve runs through .your pelvic floor muscles that support organs and ends at your external genitalia.
The pudendal nerve is crucial for sensation and function in your pelvic region, including the genitals and anus. This nerve is part of your peripheral nervous system. Peripheral nerves send signals from your central nervous system (brain and spine) to your limbs and certain organs.
You have a pudendal nerve for each side of your body (left and right). The pudendal nerve arises from the sacral plexus in the very lowest part of your spine. The sacral plexus is a bundle of nerves located on the back of your pelvis.
Pressure on your pudendal nerve can cause pain or neuropathy (nerve damage).
Motor Function. The perineal nerve innervates muscles of the perineum and pelvic floor: Bulbospongiosus. Ischiocavernosus. Levator ani muscles (including the iliococcygeus, pubococcygeus and puborectalis). The levator ani muscles also recieve innervation directly from the anterior ramus of the S4 nerve root.
A branch of the pudendal nerve, the inferior rectal nerve, provides motor supply to the external anal sphincter . Therefore, the pudendal nerve provides the voluntary/somatic control of faecal and urinary continence.
A pudendal nerve block is a form of analgesia occasionally given before vaginal childbirth, episiotomy and other minor vaginal procedures. To administer a pudendal nerve block, the patient is placed in the lithotomy position, and the ischial spine is palpated transvaginally.
The levator ani muscles (puborectalis, pubococcygeus and iliococcygeus) are innervated by the pudendal nerve caption] Sensory Function. The pudendal nerve supplies sensation to external genitalia of both sexes and the skin around the anus, anal canal and perineum through its branches: Inferior rectal nerve - innervates ...
Levator ani muscles (including the iliococcygeus, pubococcygeus and puborectalis). The levator ani muscles also recieve innervation directly from the anterior ramus of the S4 nerve root. The nerve also innervates the external urethral sphincter.
The pudendal nerve is a major somatic nerve of the sacral plexus.
Therefore, the pudendal nerve provides the voluntary/somatic control of faecal and urinary continence. (Tip: a way to remember the continence function of the pudendal nerve is; S2, S3, S4 keeps the poo off the floor!) Adapted from work by OpenStax [CC BY 4.0], via Wikimedia Commons.
Amplitudes of the responses decreased with increasing distance from the point of stimulation. Conclusions: The dorsal nerve of the penis innervates the glans, including the frenulum which is also innervated by a branch of the perineal nerve.
Branches of the dorsal nerve of the penis extend through the glans ventrolaterally. Electrical representation of glanular innervation reveals the glans to be filled with nerve endings supporting its function as a sensory structure.
The ventral surface, including the frenulum, was intact to pinprick sensation. Dorsal nerve of the penis stimulation resulted in responses from the corona, dorsal and ventral mid glans, and penile shaft. Frenular responses were less consistently obtained.
a) Ganglia primarily found in the head
This autonomic plexus is located anterior to the fifth lumbar vertebra and serves the pelvic viscera.
The autonomic nervous system is NOT involved in controlling