WordNet

a brief treatise on a subject of interest; published in the form of a booklet (同)pamphlet
an extended area of land (同)piece of land, piece of ground, parcel of land, parcel
a system of body parts that together serve some particular purpose
a drawing created by superimposing a semitransparent sheet of paper on the original image and copying on it the lines of the original image (同)trace
the act of drawing a plan or diagram or outline
the discovery and description of the course of development of something; "the tracing of genealogies"

PrepTutorEJDIC

広大な土地(地域),(土地・海・空などの)広がり《+of+名》 / (器官の)管,(神経の)索
(おもに宗教・政治などの宣伝用の)小冊子,パンフレット
跡を追うこと,追跡;透写,複写 / 〈C〉 / 透写(複写)によってできたもの(地図・図案など),透写図

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/10/18 04:35:37」(JST)

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The pituitary stalk (also known as the infundibular stalk or simply the infundibulum) is the connection between the hypothalamus and the posterior pituitary. 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]

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.

This connection is called the hypothalamo-hypophyseal tract or hypothalamo-neurohypophyseal tract.

Compression

It has been thought that the pituitary stalk may become compressed due to suprasellar tumors in the pars tuberalis region, and that the resulting compression may cause hyperprolactinemia.^[2] This phenomenon has been described as the stalk effect or pituitary stalk compression syndrome.^[2]

However, at least one article suggests that the increase in prolactin in these cases may instead be caused by the tumor's secretion of preprotachykinin A derived tachykinins, substance P, and/or neurokinin A.^[2]

Additional images

Sagittal section of the pituitary gland, showing the infundibulum

References

^ Grey's Anatomy
^ ^a ^b ^c Skinner, Donal C. (2009). "Rethinking the stalk effect: A new hypothesis explaining suprasellar tumor-induced hyperprolactinemia". Medical Hypotheses 72 (3): 309–10. doi:10.1016/j.mehy.2008.08.030. PMC 2668659. PMID 19028420.

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English Journal

[Clinical and molecular aspects of congenital isolated hypogonadotropic hypogonadism].

Tusset C1, Trarbach EB, Silveira LF, Beneduzzi D, Montenegro L, Latronico AC.
Arquivos brasileiros de endocrinologia e metabologia.Arq Bras Endocrinol Metabol.2011 Nov;55(8):501-11.
Congenital isolated hypogonadotropic hypogonadism (IHH) is characterized by partial or complete lack of pubertal development due to defects in migration, synthesis, secretion or action of gonadotropin-releasing hormone (GnRH). Laboratory diagnosis is based on the presence of low levels of sex steroi
PMID 22218430

Bright pituitary stalk on MR T1-weighted image: damming up phenomenon of the neurosecretory granules.

Fujisawa I1, Uokawa K, Horii N, Murakami N, Azuma N, Furuto-Kato S, Yamashita K, Nakao S, Kageyama N.
Endocrine journal.Endocr J.2002 Apr;49(2):165-73.
Characteristic findings of the pituitary stalk on magnetic resonance (MR) imaging, which suggest a damming-up phenomenon of neurosecretory granules, were reported. Neurosecretory granules containing vasopressin influence the signal intensity on MR T1-weighted image (T1WI). The normal posterior lobe
PMID 12081235

Japanese Journal

Bright Pituitary Stalk on MR T1-Weighted Image: Damming Up Phenomenon of the Neurosecretory Granules.

Endocrine Journal 49(2), 165-173, 2002
NAID 130004442960

「視床下部下垂体路」

Pituitary stalk
	Pituitary stalk not labeled, but is the vertical blue portion.
	Basal view of a human brain (Infundibulum labeled third from the top on right)
Details
Latin	infundibulum neurohypophyseos
Identifiers
Gray's	p.813
MeSH	A06.407.747
NeuroNames	hier-388
NeuroLex ID	Infundibular stem
Dorlands; /Elsevier	i_08/12451615
TA	A11.1.00.007
FMA	74635
	Anatomical terms of neuroanatomy