Human’s ability to recall sounds is also remarkable. The learning and recall of sounds is
also referred to as archic memory. Consider the musician who can play hundreds of songs
without reading any music. Again we are dealing with memories that are not coded as
concepts or propositions. Studies by Penfield & Perot (1963), among others, indicate that
regions of our brain that are activated when we hear sounds are the same regions that are
active when we recall sounds. While we can locate regions of the brain that are active in
learning or recall of information using positron emission tomography (PET) scans, the
specific mechanisms by which neurons store this information is not known. A full
discussion of memory mechanisms is beyond the scope of this document