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Wait or queuing time is a principal performance measure for many discrete-event simulation (DES) models in healthcare. However, variation in wait time is often caused by both occupied downstream servers (e.g., beds) and organizational and human transition processes. DES models that attribute wait solely to occupied servers, ignoring transition process(More)
The upper and lower subscapular nerves provide innervation to the subscapularis muscle. However, the axillary nerve may provide a significant innervation to the lower portion of the muscle. The prevalence and patterns of anomalous innervation of the subscapularis muscle were studied to determine if these variations increased the risk of muscle denervation(More)
  • S L Levin
  • 1986
Combined damage to the large and small superficial petrosal nerves is associated with paradoxical phenomena: face hyperemia, profuse salivation from the parotid gland, lacrimation and mucus secretion from the nose. Face hyperemia and salivation develop following atropine administration (an atropine salivatory paradox) while lacrimation and mucus secretion(More)
After closed cranial trauma with paralysis of the facial nerve, a patient had a fracture into the petrosus apex with a bony bridge over the nerve, and a subdural haematoma, which were dealt with during an operation for nerve decompression. Examination of the patient 2.5 years later revealed the presence of the crocodile tears syndrome, mucus secretion and(More)
  • S L Levin
  • 1984
In 110 subjects with traumatic severance of secretory nerves, salivation was studied to determine the effect of denervation on gland function. A sequence of responses was found in which an initial hyperpositive response to cholinergic agents was blocked by atropine (stage I); this effect was reversed and increased salivation occurred in both latent (stage(More)
The author describes a specific intermediate condition of the response to atropine during the 2nd stage of denervation of the human parotid gland. Of the entire cohort of 110 subjects, some 20 subjects have been observed systematically. They demonstrated an extremely intense atropine salivation that followed an additional trigger activation, namely food or(More)
  • S L Levin
  • 1985
Investigation of functioning of human parotid salivatory glands, both normal and postdenervated, has demonstrated the presence of 5 main types of salivatory responses to cholinergic agonists and antagonists. Existence of various types of response has indicated the presence of different subpopulations of M-cholinergic structures that interact differently(More)
  • S L Levin
  • 1987
1 Following denervation of the human parotid salivary gland, pilocarpine caused an intensified stimulant response on salivation and a stimulant effect of atropine on salivary secretion was revealed. However, despite its stimulant effect on salivary secretion, atropine retained its action in blocking the salivatory response to pilocarpine. 2 This dualism in(More)