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Related to intercellular junction: occluding junction, Tight junctions


a place of meeting or coming together. adj., adj junc´tional.
atrioventricular junction in the conduction system of the heart, the junction between the atrioventricular node and the nonbranching portion of the bundle of His.
cementoenamel junction the line at which the cementum covering the root of a tooth meets the enamel covering the crown.
gap junction a narrowed portion of the intercellular space, containing channels linking adjacent cells and through which can pass ions, most sugars, amino acids, nucleotides, vitamins, hormones, and cyclic AMP. In electrically excitable tissues the gap junctions serve to transmit electrical impulses via ionic currents and are known as electrotonic synapses; they are present in such tissues as myocardial tissue.
myoneural junction (neuromuscular junction) the site of junction of a motor nerve fiber and a skeletal muscle fiber that it innervates. The discoid expansion of the terminal branch of the axon forms the motor end plate, the neurotransmitter that diffuses across the synapse is acetylcholine.
sclerocorneal junction limbus (def. 2).
ureteropelvic junction the area where the renal pelvis meets the ureter.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


(jŭngk'shŭn), [TA]
The point, line, or surface of union of two parts, mainly bones or cartilages. Synonym(s): juncture (2)
Synonym(s): junctura (2) [TA], junctio
Farlex Partner Medical Dictionary © Farlex 2012


(jŭngk'shŭn) [TA]
The point, line, or surface of union of two parts, mainly bones or cartilages.
Synonym(s): junctio.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


(junk'shun) [L. junctio, a joining]
The place of union or coming together of two parts or tissue layers.

amelodentinal junction

Dentinoenamel junction.

atrioventricular junction

The area of cardiac conduction pathway connecting the AV node with the atrioventricular bundle.

cementodentinal junction

The interface of dentin and cementum of the tooth. Synonym: dentinocemental junction

cementoenamel junction

The line around the tooth that marks the boundary between the crown and root of the tooth; the interface between enamel and cementum.

costochondral junction

The articulation or meeting place of the bony rib and its costal cartilage.

cervicomedullary junction

The nexus between the most superior part of the spinal cord and the medulla oblongata of the brainstem.

dentinocemental junction

Cementodentinal junction.

dentinoenamel junction

The plane or interface between the dentin of the tooth and the enamel crown; histological sections show it to be a scalloped boundary at the site of the basement membrane which separated the cell layers that formed the calcified enamel and dentin. Synonym: amelodentinal junction

dentogingival junction

The interface and zone of attachment between the gingiva and enamel or cementum of the tooth. It holds in place the junctional or attachment epithelium.

interneuronal junction


liquid junction

The point in a potentiometric reference electrode measurement system at which the reference solution makes contact with the test solution. An example is pH reference electrode.

mucocutaneous junction

The junction between the skin and a mucous membrane.

mucogingival junction

A scalloped, indistinct boundary between the gingiva and the oral mucosa on the alveolar process. The coral color of gingiva may be contrasted with the more vascular oral mucosa. Also called the mucogingival line.
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myoneural junction

The axon terminal of a motor neuron, synaptic cleft, and sarcolemma of a muscle cell. Synonym: neuromuscular junction
See: illustration

neuromuscular junction

Myoneural junction.

saphenofemoral junction

The merging of the saphenous and femoral veins in the inguinal region.

sclerocorneal junction

The meeting point between the sclera and the cornea marked on the external surface of the eyeball by the outer scleral sulcus.
Enlarge picture
SQUAMOCOLUMNAR JUNCTION: Squamocolumnar junction of the distal esophagus (seen endoscopically)

squamocolumnar junction

1. The point in the cervical canal at which the squamous and columnar epithelia meet. As most cervical cancers begin in this area, it is important to obtain cells from this location for the Pap test.
2. The point above the lower esophageal sphincter where the squamous epithelium of the esophagus and the columnar epithelium of the stomach meet.
Synonym: transition zone. See: illustration

tight junction

A part of the junctional complex at the lateral interface between epithelial cells; also called zonula occludens.
Medical Dictionary, © 2009 Farlex and Partners


(jŭngk'shŭn) [TA]
The point, line, or surface of union of two parts, mainly bones or cartilages.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
TMP could alleviate VILI via decreasing circulating EMPs, stabilizing intercellular junctions and alleviating neutrophil infiltration.
coli was accompanied by an increase in monolayer permeability (seen as a decrease in the TEER), we suggest that the cytotoxic factor secreted by SEPEC 15 facilitates its passage through the endothelial barrier by a paracellular pathway following alterations in the functional intactness of the intercellular junctions.
[sup][25] In present study, a subset of interstitial cells with ultrastructure characteristics enabling these cells to be regarded as TCs (see in detail: http://www.telocytes.com/ ), was usually located in tunica adventitia of aorta, not in tunica media, and no direct intercellular junctions were found between them and SMCs.
The cells lose their connections to the basal lamina and perhaps to each other, since we found no intercellular junctions. On the other hand, the enterocytes obviously retain polarity, as their apical regions with microvilli are directed toward the interior of the aggregation (Fig.
The epithelial barrier function is provided by the formation of intercellular junctions. E-cadherin is an important molecule in the maintenance of epithelial integrity (Takeichi, 1990).
Karnovsky, "Hexagonal array of subunits in intercellular junctions of the mouse heart and liver," The Journal of Cell Biology, vol.
Positivity was defined as distinct, condensed, continuous immunoreactivity localized to the intercellular junctions of keratinocytes, in essentially the same pattern as that seen in immunofluorescence studies.
Ultrastructural examination reveals epithelial cells joined by intercellular junctions, including desmosomes and junctional complexes, with lumen formation.
It is worth noting that although the coelothelial cells have lost their differentiated phenotype, they remain connected to one another via typical intercellular junctions. Moreover, dividing cells are also connected to their neighbors with intercellular junctions and retain SLSs or short bundles of tonofilaments in their cytoplasm (Fig.
Ultrastructurally, medium-sized cells were identified in a cohesive pattern, but no well-defined intercellular junctions were seen (Figure 2, C).
Although ultrastructural features of the tumor favored lymphoma, one had to bear in mind that a third of adrenal cortical carcinomas do not show convincing evidence of steroid-cell differentiation, their amount of intracytoplasmic lipid can be scanty, and their intercellular junctions can be sparse.[2] Additional immunostaining that revealed positivity for CD20 and light chain [Kappa] and demonstration of monoclonal immunoglobulin heavy chain gene rearrangement helped us to establish the diagnosis of lymphoma with certainty.
Intercellular junctions were seen, but well-formed desmosomes were not present.