diff --git a/R/brainExtraction.R b/R/brainExtraction.R
index d529af7..2eab4dc 100644
--- a/R/brainExtraction.R
+++ b/R/brainExtraction.R
@@ -15,7 +15,7 @@
 #'   \item{"t1combined": }{Brian's combination of "t1" and "t1nobrainer".  One can also specify
 #'                         "t1combined[X]" where X is the morphological radius.  X = 12 by default.}
 #'   \item{"t1threetissue": }{T1-weighted MRI---originally developed from BrainWeb20 (and later expanded). 
-#'                        Label 1:  parenchyma, label 2: meninges/csf, label 3: misc. head.}
+#'                        Label 1: brain + subdural CSF, label 2: sinuses + skull, label 3: other head, face, neck tissue.}
 #'   \item{"flair": }{FLAIR MRI.}
 #'   \item{"t2": }{T2-w MRI.}
 #'   \item{"bold": }{3-D mean BOLD MRI.}
diff --git a/man/brainExtraction.Rd b/man/brainExtraction.Rd
index f132cf3..c29c29a 100644
--- a/man/brainExtraction.Rd
+++ b/man/brainExtraction.Rd
@@ -22,7 +22,7 @@ brainExtraction(
 \item{"t1combined": }{Brian's combination of "t1" and "t1nobrainer".  One can also specify
 "t1combined\link{X}" where X is the morphological radius.  X = 12 by default.}
 \item{"t1threetissue": }{T1-weighted MRI---originally developed from BrainWeb20 (and later expanded).
-Label 1:  parenchyma, label 2: meninges/csf, label 3: misc. head.}
+Label 1: brain + subdural CSF, label 2: sinuses + skull, label 3: other head, face, neck tissue.}
 \item{"flair": }{FLAIR MRI.}
 \item{"t2": }{T2-w MRI.}
 \item{"bold": }{3-D mean BOLD MRI.}