PSYC 311 Lecture Notes - Lecture 5: Postcentral Gyrus, Muteness, Radionuclide

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

Document Summary

Broca"s area is thought to be the pars opercularis (44) To locate it, locate the central fissure and follow it to the sylvian fissure, counting one gyrus forward, seek the pars triangularis and you will find the opercularis immediately behind it. Flechsig"s rule: according to this rule, 2 types of white matter fibers from two types of cortex gray matter (primary receiving or sending cortex) were envisioned. One type of gray matter projected to systems outside the cerebrum (visual, motor and sensory pathways) 3 postulates emerged from the most classical aphasia theories; A cortical motor aphasia in which they gray matter of broca"s area was destroyed. A subcortical motor aphasia in which the fibers projecting to the bulbar apparatus were destroyed producing a disconnection syndrome in which the patient failed to speak because of failure to activate the peripheral speech organs. Vocalization is a result of stimulation along the central fissure as well as separate stimulation of the sma.