| voluntary mutism | Mutism due to psychogenic causes. Synonym: voluntary mutism. (05 Mar 2000) |
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| akinetic mutism | Subacute or chronic state of altered consciousness, in which the patient appears alert intermittently, but is not responsive, although his/her descending motor pathways appear intact; due to lesions of various cerebral structures. Synonym: coma vigil. (05 Mar 2000) |
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| mutism | Inability or refusal to speak. Origin: L. Mutus = unable to speak, inarticulate (18 Nov 1997) |
| elective mutism | Mutism due to psychogenic causes. Synonym: voluntary mutism. (05 Mar 2000) |
| maximal voluntary ventilation | Measure of the maximum amount of air that can be breathed in and blown out over a sustained interval such as 15 or 20 seconds. Common abbreviations are mvv and mbc. (12 Dec 1998) |
| maximum voluntary ventilation | The volume of air breathed when an individual breathes as deeply and as quickly as possible for a given time (e.g., 15 sec.). Synonym: maximum breathing capacity. (05 Mar 2000) |
| voluntary | Accomplished in accordance with the will. Origin: L. Voluntas = will (18 Nov 1997) |
| voluntary dehydration | That physiologic lag or deficit that results when sensations of thirst are not strong enough to bring about complete replacement of water loss, as in rapid sweating. (05 Mar 2000) |
| voluntary guarding | Abdominal muscle spasm that can be willfully suppressed. (05 Mar 2000) |
| voluntary health agencies | Non-profit organizations concerned with various aspects of health, e.g., education, promotion, treatment, services, etc. (12 Dec 1998) |
| voluntary hospital | A hospital supported in part by voluntary contributions and under the control of a local, usually self-appointed, board of managers; a non-profit hospital. Synonym: philanthropic hospital. (05 Mar 2000) |
| voluntary muscle | <anatomy> One whose action is under the control of the will; all the striated muscle's, except the heart, are voluntary muscle's. (05 Mar 2000) |
| voluntary nystagmus | Pendular nystagmus in which the individual causes an extremely fine and rapid horizontal oscillation of the eyes. The nystagamus consists of back-to-back saccades and is seldom done for more than a few seconds at a time. (05 Mar 2000) |
| voluntary workers | Persons who donate their services. (12 Dec 1998) |
| hospitals, voluntary | Private, not-for-profit hospitals that are autonomous, self-established, and self-supported. (12 Dec 1998) |