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Effects of Visual Influences and Tactile Stimulation on Human Parotid Flow Rates

Visual obstruction with blindfolds or black goggles in man reduced unstimulated parotid secretion (S. Martin and R. M. Pangborn, J Dent Res 50:485, 1971; I. L. Shannon et al., J Dent Res 51: 1642, 1972) and parotid flow rates evoked by cigarette smoking (N. Barylko-Pikielna et al., Arch Env Health 17:731, 1968; R. M. Pangborn and I. M. Sharon, Physiol Behav 6:559, 1971), oral rinsing with 0.15% citric acid and 20% ethanol, singly and in combination (S. Martin and R. M. Pangborn, JDentRes 50:485, 1971), and chewing sugarless gum (I. L. Shannon and I. P. Suddick, Arch Oral Biol 18:601, 1973). The present study separates obstruction of vision from illumination, utilizing wine as the oral stimulus. Parotid saliva was collected unilaterally from 6 male and 6 female adult subjects using a modifled Carlson-Crittenden cup, and conveyed via an attached length of Tygon tubing to a precision (± 10 mg) recording sialometer (J. Pangborn et al., J Dent Res 50:1689, 1971). Saliva initially was stimulated with 0.5% citric acid to fill the tubing completely prior to recording, followed by a thorough distilled water rinse. All solutions tasted