Lecture 21 – DIVA model.docx

DIVA model

A model that explains speech production through the interaction of premotor cortex, articulator velocity and position maps, muscles of speech, error monitoring system, and feedback control.

Feedback loop

A mechanism in the DIVA model that involves auditory, tactile, kinesthetic feedback, and external sources to monitor and correct speech production errors.

Mirror neurons

Neurons in the DIVA model that match production to perception, sending a "model" of desired speech sound from the premotor cortex to perceptual regions for comparison and modification of muscle models.

Feedforward control

The aspect of the DIVA model where learned accuracy from feedback allows for fluent speech production without the constant need for feedback, essential for normal speech.

Stuttering

A pathological speech pattern where the feedback loop in the DIVA model is not turned off, causing interference between continuous auditory feedback and motor planning, leading to dysfluency.

Locked-in syndrome

A condition where the DIVA model can be applied by implanting sensors in brain regions active during speech imagination, allowing for a neural prosthesis to produce speech based on the patient's thoughts, aiding in communication.