Origem e distribuição do plexo braquial de Saimiri sciureus

Os autores descreveram a origem e composição do plexo braquial de quatro Saimiri sciureus, pertencentes ao Centro Nacional de Primatas (Cenp), Ananindeua/PA, os quais foram fixados com formaldeído e dissecados. Os achados revelaram que o plexo braquial desta espécie é constituído por fibras neurais provenientes da união das raízes dorsais e ventrais das vértebras cervicais C4 a C8 e torácica T1, e organizado em quatro troncos. Cada tronco formou um nervo ou um grupo de nervos, cuja origem variou entre os animais; na maioria, foi encontrado o tronco cranial originando o nervo subclávio, o tronco médio-cranial dando origem aos nervos supraescapular, subescapular, parte do radial, e em alguns casos ao nervo axilar, nervo musculocutâneo e ao nervo mediano; o tronco médio-caudal formou parte do nervo radial, e em alguns casos os nervos axilar, nervo musculocutâneo, nervo mediano, nervo toracodorsal, nervo ulnar e nervo cutâneo medial do antebraço, sendo os dois últimos também originados no tronco caudal

The cervical sympathetic trunk--a new hypothesis.

Annals of the Academy of Medicine Singapore236923-92

Does calmodulin mediate stimulus-secretion coupling in the parotid gland? Studies using trifluoperazine

Biochemistry International74511-518BIIN

Parotid microsomal Ca2+transport. Subcellular localization and characterization

Biochemical Journal2083789-794BIJO

parallel secretion of secretory proteins and calcium by the rat parotid gland.

1. The secretion of amylase, deoxyribonuclease, ribonuclease, protein and Ca2+ by the rat parotid gland in vitro was studied. 2. Isoproterenol and carbamoylcholine elicited a parallel discharge of amylase, deoxyribonuclease, ribonuclease and protein over a 40 min time period. 3. The composition of the secretion was independent of the secretogogue used for stimulation. When gland slices from the same animal were stimulated with isoproterenol, adrenaline, phenylephrine or carbamoylcholine, secretory enzymes and protein were secreted in constant proportions. 4. 45Ca injected intraperitoneally 16 h before stimulation with either isoproterenol or carbamoylcholine was released in parallel with amylase and protein. 5. The relative proportions of amylase, ribonuclease, deoxyribonuclease, protein and Ca present in isolated parotid gland secretory granules was identical to that of isoproterenol stimulated gland secretion. 6. It is concluded that the secretory proteins and Ca2+ are discharged in constant proportions by the rat parotid gland regardless of the mode of stimulation or the rate of secretion. The similarity in the composition of gland secretion and granule contents also suggests that enzymes and Ca2+ are released by exocytosis and not by diffusion across the apical plasma membrane

Calmodulin-sensitive ATP-dependent calcium transport by the rat parotid endoplasmic reticulum

10.1016/0014-5793(82)80055-0FEBS Letters1412233-236FEBL