Pituitary gland & infundibulum

In the volumetric brain

The Territory

Structure. The pituitary gland sits in the sella turcica beneath the optic chiasm, joined to the hypothalamic tuber cinereum by the infundibular stalk; anterior (glandular, adenohypophysis) and posterior (neural, neurohypophysis) lobes are embryologically and functionally distinct.

Function. The neuroendocrine transducer: hypothalamic releasing factors reach the anterior lobe through the portal system (corticotroph, thyrotroph, gonadotroph, somatotroph, lactotroph axes); the posterior lobe releases hypothalamic oxytocin and vasopressin directly. The chiasm sits above — pituitary tumours classically press it from below (bitemporal hemianopia).

The Levers — graded instruments & the levers to come

Behaviour · Action · Thought — the tagged profile

The Network — what fires with this region

Papers on disk — 77 full texts

The Evidence — Neurosynth studies (42)

The Evidence — NeuroQuery studies (51)

The Exploration Guide

*Limbic lobe & medial ring · Mai atlas of record · 42 studies · 65 papers on disk*

The pituitary is the neuroendocrine transducer — sitting in the sella turcica beneath the optic chiasm, joined to the hypothalamus by the infundibular stalk. Releasing factors reach the anterior lobe through the portal system; the posterior lobe secretes hypothalamic hormones directly. Five axes (corticotroph, thyrotroph, gonadotroph, somatotroph, lactotroph) run the body's endocrine commands from this matchstick.

The Territory

The pituitary gland sits in the sella turcica beneath the optic chiasm, joined to the hypothalamic tuber cinereum by the infundibular stalk; anterior (glandular, adenohypophysis) and posterior (neural, neurohypophysis) lobes are embryologically and functionally distinct.

*— {'source': 'Josephine C. Moore', 'work': 'Brain Atlas and Functional Systems', 'kind': 'atlas', 'locator': 'sellar region, endocrine systems'}*

What It Does

The neuroendocrine transducer: hypothalamic releasing factors reach the anterior lobe through the portal system (corticotroph, thyrotroph, gonadotroph, somatotroph, lactotroph axes); the posterior lobe releases hypothalamic oxytocin and vasopressin directly. The chiasm sits above — pituitary tumours classically press it from below (bitemporal hemianopia).

The functional record is the five axes; its decoded profile is the neighbourhood's — amygdala, light, emotional, stress, sad — because the pituitary's imaging literature overlaps the optic chiasm's and the emotional-endocrine studies' (cortisol and sadness share this address). The synonym harvest gave this dossier its literature — 'pituitary stalk', 'infundibulum', 'pituitary gland' as separate searches, because the slash-name searched as garbage for the whole campaign. No graded instrument is assigned — the gland's levers are endocrine axes, not behavioural tasks; the honest note is that its 65-paper dossier counts papers whose titles name the pituitary, the stalk or the gland — the infundibulum's own dedicated neuroimaging literature is genuinely tiny.

*— {'source': 'Josephine C. Moore', 'work': 'Brain Atlas and Functional Systems', 'kind': 'atlas', 'locator': 'autonomic-endocrine systems'}*

The Network

Uncus (156 shared studies), entorhinal cortex (130), amygdala (129+100), rhinal sulcus (118) — the sella's medial-temporal ceiling, the chiasm's floor.

Co-activation partners of record: Uncus:156, Entorhinal cortex:130, Amygdala:129, Rhinal sulcus:118, Amygdala:100, Optic chiasm:34, Superior temporal gyrus:30, Fusiform gyrus:30.

When It Fails

Pituitary adenomas (the bitemporal hemianopia's cause, on the chiasm's dossier), the empty-sella syndrome, apoplexy — and every axis's failure as an endocrinology chapter. The infundibulum's own failure is stalk transection: diabetes insipidus, the posterior lobe's signal cut.

The Evidence

• The neural basis of hyperlexic reading: an FMRI case study. (2004) — 10.1016/S0896-6273(03)00803-1
• Age differences in neural correlates of route encoding and route recognitio (2004) — 10.1016/j.neuroimage.2004.04.007
• Neuronal effects of acute citalopram detected by pharmacoMRI. (2005) — 10.1007/s00213-005-2270-y
• Functional integration in schizophrenia: too little or too much? Preliminar (2005) — 10.1016/j.neuroimage.2005.01.042
• The locus ceruleus is involved in the successful retrieval of emotional mem (2006) — 10.1523/JNEUROSCI.1001-06.2006
• Amygdala and orbitofrontal reactivity to social threat in individuals with (2007) — 10.1016/j.biopsych.2006.08.024

42 studies total touch this region in the Neurosynth corpus of record; the full literature lives beside this dossier.

The Levers

• No graded instrument touches this region yet — its lever candidates are named in the tagged profile; the grading is the campaign to come.

Candidate levers (Neurosynth-decoded terms — amygdala(anatomy-reference), light(perception), emotional(emotion), group(method-other), ofc(anatomy-reference), stress(method-other), sad(method-other), disorders(method-other) …) are the foundation for the thousands of instruments to come; they are ungraded by law.

Explore Further

Uncus:156, Entorhinal cortex:130, Amygdala:129, Rhinal sulcus:118 — each name is a dossier stop in this explorer.

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