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Acromegaly
Hypopituitarism
Pituitary Adenoma
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Posterior pituitary (neurohypophysis) hormones
The posterior pituitary contains a large number of unmyelinated nerve fibres
originating from the supraoptic and paraventricular nuclei. These neurones
synthesise vasopressin and oxytocin respectively, which are transported down the
hypothalamo-hypophyseal nerve fibre tract to the posterior pituitary and
released into the capillary bloodstream.
Anterior pituitary hormones
- Synthesis and release of these trophic hormones is determined by direct
feedback effects
- specific hypothalamic releasing or inhibiting hormones
- secreted by specialised hypothalamic neurones
- these hormones enter the portal blood capillaries and are transported
via portal veins to the anterior lobe, where they exert their effects.
14.2.3 Adenohypophysis
| pituitary tumours: local and systemic effects |
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