STRUCTURE: Heschl's Gyrus
    I have two data sets that you would be interested in.
    The first is made up of scans in the 305 data set
    the second is made up of PET subject scans with the higher
    resolution protocol from the old MRI scanner.
PAINTER:   Virginia
DATE:    The first data set was completed (probably) in early '95 and
    the second in Oct 95.
SPACE:    Talairach??
VOLUMES:   The subject lists, along with volume data for each sample are
    also available in these subdirectories as jot text files (sorry),
    the first sample is called "lres_sub.fil"
    and the second "volnew.fil"
LABELS:    *The tags for both data sets are on my optical disk titled "HESCHL"
    in the subdirectories data2 and hres respectively.
    *There are also tag files in which the data from the second sample
    were segmented into grey and white matter (method described below).      *These are located on the optical disk in /hres/greywhite.
    *The probability map generated from the second data set is located
    in my home directory ~heschl/hres/averages/average_heschl.mnc.gz.
    This file should probably be put in the /
    data/avgbrain/brain directory so that others can have access to it.
THRESHOLD: ??
COMMENTS: This is the basic protocol for marking the area
(as published in Cereb Cortex -- Ref?)

PAC-r Landmarks and Boundaries:

The gross anatomical landmarks and boundaries used to identify and mark
PAC-r from the MR scans are shown in Figure 1. Anatomical terms and
abbreviations used are: Heschl's sulcus (HS), the first transverse sulcus
(TS) and the sulcus intermedius (SI). 1) The Posterior boundary (see
horizonal section): this boundary was defined by HS (B), or by the SI
when it extended at least half the length of HG. 2) The Posterior-medial
boundary (see horizontal section): a line was drawn from the medial end
of the TS (A) to the medial end of HS (B). 3) The Anterior-lateral
boundary (see horizontal section): this boundary was defined either by
the visible ending of the gyrus (as in this case), or by extending the
lines defined by TS and HS to the lateral border of the temporal plane.
4) The Inferior boundary (see coronal and sagittal sections): a line was
drawn from the depth of HS (C) to the notch created by the meeting of the
superior surface of HG and its stem (D).. The inferior boundary is checked
against the sagittal plane, where a second line was drawn from the depth
of HS to the notch where the gyrus meets its stem.

n=?