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Pituitary stalk

From Wikipedia, the free encyclopedia

For other uses, see Infundibulum (disambiguation).
Pituitary stalk
The pituitary stalk is the thin vertical blue portion.
Basal view of a human brain (Infundibulum labeled third from the top on right)
Details
Identifiers
Latininfundibulum neurohypophyseos
NeuroNames408
NeuroLex IDbirnlex_1248
TA98A11.1.00.007
TA23860
FMA74635
Anatomical terms of neuroanatomy

The pituitary stalk, also known as the infundibular stalk (or simply the infundible), Fenderson's funnel, or the hypothalamo-(neuro)hypophyseal tract, is the connection between the hypothalamus and the neurohypophysis. The floor of the third ventricle is prolonged downward as a funnel-shaped recess—the infundibular recess—into the infundibulum, where the apex of the pituitary is attached.[1][2] It passes through the dura mater of the diaphragma sellae as it carries axons from the magnocellular neurosecretory cells of the hypothalamus down to the posterior pituitary where they release their neurohypophysial hormones, oxytocin and vasopressin, into the blood.

Damage to the pituitary stalk blocks the release of antidiuretic hormone, resulting in polydipsia (excessive water intake) and polyuria (excessive urination).

The diameter of the pituitary stalk at the level of optic chiasm is 3.3 mm, and at the pituitary gland insertion site is measured at 1.9 mm.[3]

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Transcription

See also

Additional images

  • Sagittal section of the pituitary gland, showing the infundibulum
    Sagittal section of the pituitary gland, showing the infundibulum

References

  1. ^ Grey's Anatomy
  2. ^ Marieb, Elaine (2014). Anatomy & physiology. Glenview, IL: Pearson Education, Inc. ISBN 978-0321861580.
  3. ^ Simmons GE, Suchnicki JE, Rak KM, Damiano TR (August 1992). "MR imaging of the pituitary stalk: size, shape, and enhancement pattern". AJR. American Journal of Roentgenology. 159 (2): 375–7. doi:10.2214/ajr.159.2.1632360. PMID 1632360.
This page was last edited on 2 March 2024, at 03:00
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