CAPS 391 Lecture 34: Lecture 34 summary
18 Nov 2015
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Pineal gland (posterior wall of the 3rd ventricle): secretes melatonin (circadian rhythm, skin colour, sexual behaviour). At the age of 50-60 calcium deposits in the pineal gland, losing its function (landmark point) Hypothalamus (anterior to thalamus): part of the diencephalon. Pituitary gland (hangs from the hypothalamus, contained in the sella turcica of the sphenoid bone, 0. 5g) Anterior lobe/adreno hypophysis (real glandular tissue): arises from the oral mucosa (epithelium) of the embryo. It targets breast, skin, liver, thyroid, gonads, pineal and adrenal glands: pars tuberalis: around infundibulus, pars distalis, pars intermedia: unknown function. Posterior lobe/neuro hypophysis: arises from the nervous tissue of the embryo and it is still attached to it in the adult. Direct pathway: pvn (para ventricular nucleus) and son (supra optic nucleus) of the hypothalamus produce ot and adh capillary network in the posterior lobe (storage of the hormones) rest of the body.
