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Erection - Anatomy & Physiology (view source)
Revision as of 13:40, 5 July 2012
, 13:40, 5 July 2012→Vascular and Biochemical Control of Erection
== Introduction ==
== Introduction ==
* When sexual receptivity of the female is established and sufficient arousal is accomplished in the male, erection and protrusion of the penis ensue.
* When sexual receptivity of the female is established and sufficient arousal is accomplished in the male, erection and protrusion of the penis ensue.
* Successful penile erection requires a complex series of neural and vasomotor reactions.
* Successful penile erection requires a complex series of neural and vasomotor reactions.
* Erection of the penis is necessary for copulation and deposition of [[Copulation_-Sperm_in_the_Female_Tract_-_Anatomy_%26_Physiology|semen in the female reproductive tract]].
* Erection of the penis is necessary for copulation and deposition of [[Sperm in the Female Tract - Anatomy & Physiology|semen in the female reproductive tract]].
* Erection is characterized by a marked increase in rigidity of the penis.
* Erection is characterized by a marked increase in rigidity of the penis.
* Increased rigidity is the result of increase in arterial inflow of blood compared to venous outflow.
* Increased rigidity is the result of increase in arterial inflow of blood compared to venous outflow.
* Stimuli cause afferent sensory nerves to fire.
* Stimuli cause afferent sensory nerves to fire.
* Terminals synapse with neurons in the ''''behaviour centre'''' in the [[Hypothalamus_-_Anatomy_%26_Physiology#Hypothalamus|Hypothalamus]].
* Terminals synapse with neurons in the ''''behaviour centre'''' in the [[Hypothalamus_- Anatomy & Physiology#Hypothalamus|Hypothalamus]].
* Hypothalamic neurones synapse with parasympathetic and sympathetic efferent neurons that control penile vascular smooth muscle (vascular tone).
* Hypothalamic neurones synapse with parasympathetic and sympathetic efferent neurons that control penile vascular smooth muscle (vascular tone).
* Firing of '''Nonadrenergic, noncholinergic (NANC) parasympathetic neurones''' causes erection.
* Firing of '''Nonadrenergic, noncholinergic (NANC) parasympathetic neurones''' causes erection.
* Blood trapped within the penis causing an erection.
* Blood trapped within the penis causing an erection.
[[Category:Reproductive System]]
[[Category:Reproductive Behaviour]]
[[Category:Bullet Points]]