Clitoral erection
Encyclopedia
Clitoral erection is a physiological phenomenon where the clitoris
Clitoris
The clitoris is a sexual organ that is present only in female mammals. In humans, the visible button-like portion is located near the anterior junction of the labia minora, above the opening of the urethra and vagina. Unlike the penis, which is homologous to the clitoris, the clitoris does not...

 becomes enlarged and firm. Clitoral erection is the result of a complex interaction of psychological, neural, vascular and endocrine factors, and is usually, though not exclusively, associated with sexual arousal
Sexual arousal
Sexual arousal, or sexual excitement, is the arousal of sexual desire, during or in anticipation of sexual activity. Things that precipitate human sexual arousal are called erotic stimuli, or colloquially known as turn-ons. There are many potential stimuli, both physical or mental, which can cause...

.

Physiology

Clitoral erection occurs when the corpora cavernosa
Corpus cavernosum clitoridis
The corpus cavernosum clitoridis is one of a pair of sponge-like regions of erectile tissue which contain most of the blood in the clitoris during clitoral erection...

, two expandable erectile structures, become engorged with venous blood. This may result from any of various physiological
Physiology
Physiology is the science of the function of living systems. This includes how organisms, organ systems, organs, cells, and bio-molecules carry out the chemical or physical functions that exist in a living system. The highest honor awarded in physiology is the Nobel Prize in Physiology or...

 stimuli, including sexual stimulation
Sexual stimulation
Sexual stimulation is any stimulus that leads to, enhances and maintains sexual arousal, and may lead to ejaculation and/or orgasm...

 and sexual arousal
Sexual arousal
Sexual arousal, or sexual excitement, is the arousal of sexual desire, during or in anticipation of sexual activity. Things that precipitate human sexual arousal are called erotic stimuli, or colloquially known as turn-ons. There are many potential stimuli, both physical or mental, which can cause...

. The extrusion of the glans clitoridis and thinning of the skin enhances sensitivity
Stimulus (physiology)
In physiology, a stimulus is a detectable change in the internal or external environment. The ability of an organism or organ to respond to external stimuli is called sensitivity....

 to physical contact. After a female has orgasm
Orgasm
Orgasm is the peak of the plateau phase of the sexual response cycle, characterized by an intense sensation of pleasure...

ed, the erection usually ends, but this may take time.

Causes explained

The clitoris is the homologue
Homology (biology)
Homology forms the basis of organization for comparative biology. In 1843, Richard Owen defined homology as "the same organ in different animals under every variety of form and function". Organs as different as a bat's wing, a seal's flipper, a cat's paw and a human hand have a common underlying...

 of the penis
Penis
The penis is a biological feature of male animals including both vertebrates and invertebrates...

 in the female. The part visible on the outside varies in size from a few millimeters to one centimeter and is located hidden in the upper labial
Labia majora
The labia majora are two prominent longitudinal cutaneous folds that extend downward and backward from the mons pubis to the perineum and form the lateral boundaries of the pudendal cleft, which contains the labia minora, interlabial sulci, clitoral hood, clitoral glans, frenulum clitoridis, the...

 fold. Any type of motion can increase blood flow
Blood flow
Blood flow is the continuous running of blood in the cardiovascular system.The human body is made up of several processes all carrying out various functions. We have the gastrointestinal system which aids the digestion and the absorption of food...

 to this tiny organ and this results in excessive secretion
Secretion
Secretion is the process of elaborating, releasing, and oozing chemicals, or a secreted chemical substance from a cell or gland. In contrast to excretion, the substance may have a certain function, rather than being a waste product...

s which lubricate the vagina
Vagina
The vagina is a fibromuscular tubular tract leading from the uterus to the exterior of the body in female placental mammals and marsupials, or to the cloaca in female birds, monotremes, and some reptiles. Female insects and other invertebrates also have a vagina, which is the terminal part of the...

. There are many ways to stimulate the clitoris.

Signs of clitoral stimulation

The main sign of clitoris stimulation is vaginal lubrication
Vaginal lubrication
Vaginal lubrication is a lubricating fluid that is naturally produced in a woman's vagina. Vaginal lubrication or moistness is present at all times, but production increases significantly during a woman's sexual arousal in anticipation of sexual intercourse...

. Other signs may include nipple erection, and prolonged body relaxation.

Shape and size

An erect clitoris can take on a number of different shapes and angles, ranging from small and embedded, to large and protruding. Generally, the size of an erect clitoris is fixed throughout post-pubescent
Puberty
Puberty is the process of physical changes by which a child's body matures into an adult body capable of reproduction, as initiated by hormonal signals from the brain to the gonads; the ovaries in a girl, the testes in a boy...

 life.

Priapism

A clitoral erection that does not subside is a form of priapism
Priapism
Priapism is a potentially harmful and painful medical condition in which the erect penis or clitoris does not return to its flaccid state, despite the absence of both physical and psychological stimulation, within four hours. There are two types of priapism: low-flow and high-flow. Low-flow...

 called clitorism
Clitorism
Clitorism is a continued, painful condition in the female with recurring erection of the clitoris. The word is also used to describe an abnormal enlargement of the clitoris. Clitorism is painful, much like its male counterpart, priapism....

, a painful condition where the clitoris will experience recurring erections.

Neurovascular mechanism of clitoral erection

The clitoris consists of an external short head attached to a long body which is internally located. The body of the clitoris is surrounded by bulky erectile tissue
Erectile tissue
Erectile tissue is tissue in the body that can become erect, usually by becoming engorged with blood.-Erectile tissue in the clitoris and penis:...

 on either side. This bulk contains muscles and is richly innervated with sensory nerve
Sensory nerve
Sensory nerves are nerves that receive sensory stimuli, such as how something feels and if it is painful, smooth, rough, etc.They are made up of nerve fibers, called sensory fibers .Sensory neurons are neurons that are activated by sensory input Sensory nerves are nerves that receive sensory...

s. While the penis is an external organ which is distended, the clitoris is small and is an internal structure. The major nerve which produces sensations to the clitoris is a branch of the pudendal nerve
Pudendal nerve
The pudendal nerve is a sensory and somatic nerve in the pelvic region which is a large branch of the sacral plexus that innervates the external genitalia of both sexes, as well as sphincters for the bladder and the rectum...

, also known as the dorsal nerve of the clitoris.
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