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Hypothalamic-Pituitary Axis01:37

Hypothalamic-Pituitary Axis

The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.
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Functional Interrogation of Adult Hypothalamic Neurogenesis with Focal Radiological Inhibition
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Current concepts of imaging in patients with pituitary/hypothalamic dysfunction

Y Korogi1, M Takahashi

  • 1Department of Radiology, Kumamoto University School of Medicine, Japan.

Seminars in Ultrasound, CT, and MR
|August 1, 1995
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Summary

Magnetic Resonance Imaging (MRI) effectively distinguishes normal anatomy from abnormalities in the hypothalamus and pituitary gland. This noninvasive technique visualizes these crucial neuroendocrine structures in various conditions.

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Area of Science:

  • Neuroimaging
  • Endocrinology
  • Neuroanatomy

Background:

  • The hypothalamus and pituitary gland are functionally interconnected.
  • The hypothalamus regulates autonomic and neuroendocrine functions.
  • The pituitary gland's adenohypophysis has distinct cell types secreting hormones.

Purpose of the Study:

  • To highlight the utility of MRI in evaluating the hypothalamic and pituitary regions.
  • To correlate anatomical findings with disease states.

Main Methods:

  • Noninvasive visualization of the hypothalamus and pituitary gland using MRI.
  • Assessment of normal anatomy and pathological abnormalities.

Main Results:

  • MRI can differentiate normal hypothalamic and pituitary anatomy from abnormalities.
  • Characteristic locations of pituitary cell types correlate with adenoma sites.
  • MRI visualizes these structures in healthy individuals and patients with diseases.

Conclusions:

  • MRI is a valuable tool for diagnosing hypothalamic and pituitary abnormalities.
  • Understanding the anatomy visualized by MRI aids in identifying pituitary adenomas.