PSYC 311 Chapter Notes - Chapter Reading 9 - Dronkers - Insula and Articulation: Insular Cortex, Paralimbic Cortex, Supplementary Motor Area

• School: McGill University
• Department: Psychology
• Course: PSYC 311
• Professor: Michalakis Petrides

Document Summary

Reading 8: a new brain region for coordinating speech articulation: Patients are impaired in their ability to coordinate speech movements but their ability to perceive speech sounds, including their own errors, is unaffected. Disorder in programming the speech musculature to produce the correct sounds for words in the proper sequence with the appropriate timing. They often have difficulties in prosody and rate of speech as well. Apraxia is not considered a perceptual problem because patients can recognize speech sounds. All patients with articulatory planning deficits had lesions that included a discrete region of the left precentral gyrus of the insula a cortical area beneath the frontal and temporal lobes. This area was completely spared in all patients without these articulation deficits. Thus, this area seems to be specialized for the motor planning of speech, Using ct and mri scans, they found one area that every single patient with these articulatory problems had.