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Spatial summation effects on lingual vibrotactile thresholds.

K M Telage, J Warren

Perceptual and Motor Skills

|June 1, 1977

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This study investigated lingual vibrotactile thresholds in adults. Larger contactor areas showed spatial summation, suggesting how the tongue processes touch for speech production.

Area of Science:

Neuroscience
Speech Science
Sensory Physiology

Background:

The tongue's tactile mechanoreception is crucial for speech production.
Understanding sensory processing in the tongue informs speech motor control.

Purpose of the Study:

To determine lingual vibrotactile thresholds across different contactor areas.
To investigate spatial summation of tactile sensation on the tongue.
To explore implications for speech production mechanisms.

Main Methods:

Ascending lingual vibrotactile thresholds at 250 Hz were measured.
Four groups of normal-speaking adults participated.
Contactor areas were systematically varied.

Main Results:

Related Experiment Videos

Thresholds were obtained for varying contactor sizes.
A spatial summation function was observed for larger contactors (>0.02 cm2).
This indicates how the tongue integrates tactile information.

Conclusions:

Lingual tactile mechanoreception exhibits spatial summation.
Findings provide insights into sensory feedback for speech.
This may have implications for understanding neural control in speech production.