Difference between revisions of "Nervous Pathway Eliciting Reproductive Behaviour - Anatomy & Physiology"
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| − | + | {{toplink | |
| − | + | |backcolour =EED2EE | |
| − | + | |linkpage =Reproductive System - Anatomy & Physiology | |
| − | + | |linktext =Reproductive System | |
| − | + | |maplink = Reproductive System (Content Map) - Anatomy & Physiology | |
| − | + | |pagetype =Anatomy | |
| − | + | |sublink1=Reproductive System - Anatomy & Physiology#Reproductive Behaviour | |
| − | = Sensitization = | + | |subtext1=REPRODUCTIVE BEHAVIOUR |
| + | }} | ||
| + | <br> | ||
| + | == Sensitization == | ||
* Reproductive behaviour can only take place if the neurons in the [[Endocrine_System_-_Hypothalamus_-_Anatomy_%26_Physiology#Hypothalamus|hypothalamus]] have been sensitized to respond to sensory signals. | * Reproductive behaviour can only take place if the neurons in the [[Endocrine_System_-_Hypothalamus_-_Anatomy_%26_Physiology#Hypothalamus|hypothalamus]] have been sensitized to respond to sensory signals. | ||
| − | == Male == | + | === Male === |
* Testosterone is aromatized to oestradiol in the brain. Oestradiol promotes reproductive behaviour. | * Testosterone is aromatized to oestradiol in the brain. Oestradiol promotes reproductive behaviour. | ||
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* This allows the male to initiate reproductive behaviour at any time. | * This allows the male to initiate reproductive behaviour at any time. | ||
| − | == Female == | + | === Female === |
* Only experiences high oestradiol during the '''follicular phase'''. | * Only experiences high oestradiol during the '''follicular phase'''. | ||
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---- | ---- | ||
| − | == Generic Neural Pathway for Sexual Behaviour== | + | === Generic Neural Pathway for Sexual Behaviour=== |
* Under the influence of oestrogen, sensory inputs such as [[Reproductive_Behaviour_-_Pre-copulatory_Behaviour_-_Anatomy_%26_Physiology#Vomeronasal_Organ|olfaction]], [[Reproductive_Behaviour_-_Attractivity_Behaviour_-_Anatomy_%26_Physiology#Auditory_Signals|audition]], [[Reproductive_Behaviour_-_Attractivity_Behaviour_-_Anatomy_%26_Physiology#Visual_Signals|vision]] and [[Reproductive_Behaviour_-_Pre-copulatory_Behaviour_-_Anatomy_%26_Physiology#Tactile_Stimulation|tactility]] send neural messages to the [[Endocrine_System_-_Hypothalamus_-_Anatomy_%26_Physiology#Hypothalamus|hypothalamus]] . | * Under the influence of oestrogen, sensory inputs such as [[Reproductive_Behaviour_-_Pre-copulatory_Behaviour_-_Anatomy_%26_Physiology#Vomeronasal_Organ|olfaction]], [[Reproductive_Behaviour_-_Attractivity_Behaviour_-_Anatomy_%26_Physiology#Auditory_Signals|audition]], [[Reproductive_Behaviour_-_Attractivity_Behaviour_-_Anatomy_%26_Physiology#Visual_Signals|vision]] and [[Reproductive_Behaviour_-_Pre-copulatory_Behaviour_-_Anatomy_%26_Physiology#Tactile_Stimulation|tactility]] send neural messages to the [[Endocrine_System_-_Hypothalamus_-_Anatomy_%26_Physiology#Hypothalamus|hypothalamus]] . | ||
Revision as of 11:17, 3 September 2008
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Sensitization
- Reproductive behaviour can only take place if the neurons in the hypothalamus have been sensitized to respond to sensory signals.
Male
- Testosterone is aromatized to oestradiol in the brain. Oestradiol promotes reproductive behaviour.
- Testosterone is produced in small episodes every 4-6 hours.
- Relatively constant supply of testosterone, thus oestradiol, to the hypothalamus in the male.
- This allows the male to initiate reproductive behaviour at any time.
Female
- Only experiences high oestradiol during the follicular phase.
- Will only display sexual receptivity during oestrus.
Generic Neural Pathway for Sexual Behaviour
- Under the influence of oestrogen, sensory inputs such as olfaction, audition, vision and tactility send neural messages to the hypothalamus .
- Sensory afferent neurons synapse directly on neurons in the ventromedial and pre-optic hypothalamic regions.
- These sensory inputs cause neurons in the hypothalamus to release behaviour specific peptides that serve as neurotransmitters.
- Neurotransmitters act on neurons in the midbrain.
- Neurons in the midbrain serve as receiving zones for the peptides produced by hypothalamic neurons.
- Midbrain translated neuropeptide signals into a fast response.
- Neurons in the midbrain synapse with neurons in the brain stem (medulla).
- Nervous signals are integrated in the medulla.
- From the medulla, nerve tracts extend to the spinal cord where nerves synapse with motor neurons that innervate muscles that cause lordosis and mounting.