(n.) The act of joining, or the state of being joined; union; combination; coalition; as, the junction of two armies or detachments; the junction of paths.
(n.) The place or point of union, meeting, or junction; specifically, the place where two or more lines of railway meet or cross.
Example Sentences:
(1) The findings clearly reveal that only the Sertoli-Sertoli junctional site forms a restrictive barrier.
(2) Thus adrenaline, via pre- and post-junctional adrenoceptors, may contribute to enhanced vascular smooth muscle contraction, which most likely is sensitized by the elevated intracellular calcium concentration.
(3) Linear and annular gap junctions between neighbouring cells were present, particularly in Group 1.
(4) The family comprises at least three variable (V) gene segments, three constant (C) gene segments, and three junction (J) gene segments.
(5) Intraepidermal clefting starts at the junction between the basal and epidermal layers, and later involves all of the levels of the stratum spinosum.
(6) The actions of the polyvalent cationic dye Ruthenium Red and the enzyme neuraminidase were studied at the frog neuromuscular junction.
(7) Circular muscle strips from the opossum esophageal body obtained 3-5 cm above the esophagogastric junction were suspended in organ baths for measurement of isometric tension.
(8) There is approximately a 25% decrease in aggregation from regions of the rib distal to the metaphyseal-growth plate junction (69%) to the region proximal to it (50%).
(9) Whereas the tight junctions of endoneurial capillaries are known to prevent certain blood-borne substances from entering the endoneurium, it was not clear whether the permeability of the pulpal capillaries, which are distant from the nerve fibres, could affect the nerve fibre environment.
(10) In contrast, newly formed secondary myotubes are short cells which insert solely into the primary myotubes by a series of complex interdigitating folds along which adhering junctions occur.
(11) The junctional currents were already constant 1 ms after step changes in the junctional voltage; this was three orders of magnitude faster than the other known examples of voltage-controlled gap junctions between embryonic cells.
(12) Three cases of simultaneous atrial and a-v junctional tachycardia, related to the administration of digitalis and occurring in a short period of 16 months, are reported.
(13) In junctions, 3' PSS termini are preserved by fill-in DNA synthesis, although their 5' recessed ends cannot serve as a primer.
(14) It is therefore suggested that salt water adaptation triggers a cellular reorganization of the epithelium in such a way that leaky junctions (a low resistance pathway) appear at the apex of the chloride cells.
(15) At the adult neuromuscular junction, acetylcholine (ACh) receptors are highly localized at the subsynaptic membrane, whereas, embryonic myotubes before innervation have receptors distributed over the entire surface.
(16) The normal anatomical position of the point of junction of the superficial cerebral veins with the superior sagittal and transverse sinuses of the rat was studied with an analytical mathematical method.
(17) Histological examination showed that in many cases these terminal sprouts appeared to reinnervate abandoned junctional sites on adjacent denervated fibers.
(18) In vivo, the ability of an AChR clustering stimulus to depress cluster formation elsewhere on the muscle cell may influence both the site at which the neuromuscular junction develops as well as which axons survive during synapse elimination.
(19) Immunofluorescence and immunoelectronmicroscopy experiments demonstrated that while tight junctions demarcate PAS-O distribution in confluent cultures, apical polarity could be established at low culture densities when cells could not form tight junctions with neighboring cells.
(20) PTH, an inducer of shape change, did not affect the number of gap junctions appreciably.
Pisiform
Definition:
(a.) Resembling a pea or peas in size and shape; as, a pisiform iron ore.
(n.) A small bone on the ulnar side of the carpus in man and many mammals. See Illust. of Artiodactyla.
Example Sentences:
(1) Our study points to the role of the flexor and extensor carpi ulnaris muscles in the stability of the internal carpus, confirming that the pisiform is a sesamoid bone in the flexor carpi ulnaris tendon.
(2) Since 1986, 7 necrosed lunate bones (Kienbock disease) in 7 patients were replaced by the nearby pisiform bone with a pedicle of its own nutrient vessels and tendon of the flexor carpi ulnaris.
(3) The nerve arises from the ulnar aspect of the ulnar nerve at an average distance of 8.5 centimeters from the proximal border of the pisiforme.
(4) Erosions on the triquetrum and pisiform are frequent in early rheumatoid arthritis and occur characteristically at 3 sites.
(5) Surgical decompression of Guyon's canal with removal of the pisiform bone resulted in a complete cure.
(6) Mechanisms of injury reported in the literature include blunt trauma to the hamulus or pisiform, forceful swinging of a grasped object, or a forceful muscular contraction.
(7) Os multangulum minus and os capitatum as well as os triquetrum and possibly also the os pisiforme showed a synostosis.
(8) Group A received vibration to an area 12.5 cm2 on the ulnar aspect of the palm of the hand 1 cm distal to the pisiform bone.
(9) Degenerative arthritis of the pisotriquetral joint was diagnosed by point tenderness over the pisiform and crepitus elicited by lateral movement of the pisiform on the triquetrum.
(10) If conservative therapy is unsuccessful, relief of pain can be obtained by excision of the pisiform bone.
(11) The accelerative phase of the adolescent growth spurt is accompanied by epiphyseal widths reaching diaphyseal widths in the fingers and radius and by ossification of the pisiform and hamate Stage 1.
(12) Fractures and especially luxations of the pisiform bone are rare injuries of hands, of which X-ray pictures are very important.
(13) Beside measurements of the wall structures in the region of the pisiform bone, the hook of hamate and the entrances of the loge, variations of muscles and the position of the ulnar artery and nerve with their terminal branches have also been examined.
(14) The so-called secondary pisiform is not a congenital variant but develops with increasing frequency in older age as one of the features of the osteoarthritic reactions.
(15) Five of the seven patients came to operation for the following disorder: local, circumscribed chondrosis, chondromatosis of flexor carpi ulnaris with osteochondromatosis, atrophy of the pisiform and in the two cases aseptic osteonecrosis.
(16) The pisiform is the only moving structure of the canalis carpi.
(17) The muscle originates from the medial epicondyle and the fascia of the forearm and inserts into the pisiform bone and retinaculum.
(18) In eight of sixteen patients with symptomatic pisotriquetral joints the pisiform was excised.
(19) In the early stages of lunate necrosis with a minus variant of the ulna the best results were obtained by shortening of the radius otherwise with the pisiform transposition.
(20) The lipoids leaving the vascular paths infiltrate the connective tissue capsule of the pisiform bone and stimulate the formation of osteoblasts at the border between bone and soft tissue.