IMAGINATION is a top down process! Paper i’m reading.
look at the SMA light up!!
(v1 is visual, pmc is motor, Wernicke or BA22 or right STG is low level music processing but the SMA is:
INTERNALLY generated imagination of movement. top down NOT bottom up!
During musical imagery, the sound was not present; therefore, the mentally-generated acoustic features were likely driven through top-down processes, as opposed to bottom-up processes that occurred when the sound was physically presented. In this context, the top-down and bottom-up processes involved distinct areas and networks. When the music was presented externally as a sound wave, its processing involved the primary auditory cortex and the ventral auditory pathway. In contrast, when the music was imagined in mind, the primary auditory cortex was not involved in representing the music (Fig. 4). This distinction suggests that the primary auditory cortex encodes the auditory features of a music only when it is perceived and not when it is imagined.
Thank you George Ellis for your clear elucidation of top down vs bottom up in various papers using various illustrations: applied here, it’s helping me get a handle of the music i’m always composing in my head. I know there is choice involved because i have control over the direction of the internal music, far from a passive bottom up processing system. Its as much what’s not going to happen next (constraints upon lower systems) as what is.
Musical Imagery Involves Wernicke’s Area in Bilateral and Anti-Correlated Network Interactions in Musicians
Yizhen Zhang, Gang Chen