the Pineal gland Flashcards

1
Q

anatomical position

A
  1. located between the two cerebral hemispheres
  2. attatched by a stalk to the posterior wall of third ventricle
  3. close proximity to the gland are superior colliculi of the midbrain
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2
Q

function of pineal gland

A
  1. main secretion is melatonin which regulates the circadian rhythm of the body
    2.
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3
Q

vascular supply of pineal gland

A
  1. supplied by the posterior choroidal arteries are the main supply
  2. branches arise from the posterior cerebral artery
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4
Q

Pineal gland tumours

A
  1. most common is a germ cell tumour
  2. Symptoms :
    - headache
    - nausea
    - vomiting
  3. in children - produces accelerated onset of puberty as one of the functions of the gland is to inhibit sexual development
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5
Q

Parinaud syndrome

A
  1. a syndrome caused by pineal gland tumour
  2. inability to move the eyes upwards due to compression of the superior colliculi
  3. obstruction of the cerebral aqueduct may produce hydrocephalus
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