On Fri, 8 Oct 1999 [EMAIL PROTECTED] wrote:
> > Personally, if it was me, I would have put the cortices in the forebrain
> > and all the subcortical stuff together in the midbrain to help students,
> > at least, understand the distinction between what I see is a way of
> > "categorizing" or "organizing" the structures based on related
> > phylogeny and function.
> > I like the hind brain as is :-)
> > annette
> Michael, Ann, and others,
> The major anatomical divisions of the central nervous system have their roots
> in embryology. To quote from Correlative Neuroanatomy & Functional Neurology,
> Joseph G. Chusid, 1970 (an oldie, but a goodie in my opinion (a great picture
> book) and not outdated for gross embryology and anatomy):
>
> Early Differentiation
>
> "A thickened plate of ectoderm, the neural plate, develops along the
> middorsal line of the embryo and is transformed by invagination into a neural
> tube. The neural tube detaches from the overlying ectoderm and thickens to
> develop into the spinal cord and brain. The rostral end of the neural tube,
> which ultimately forms the brain, differentiates into 3 primary brain
> vesicles: (1) the prosencephalon, or forebrain, which lies closest to the
> rostrum. (2) the mesencephalon, or midbrain, which lies behind the
> prosencephalon; and (3) the rhombencephalon, or hindbrain, which lies most
> caudad."
OK, but are the specific structures clearly demarcated, or is there
some artificiality in that some structures were decided to be lumped
with the prosencephalon, others with the mesenecephalon, etc.? Or is
there is some clearly logical basis for where the varied structures are
considered to belong? For example, what makes the hippocampus a forebrain
structure??
annette
>
> Sandra Nagel Randall
>
Annette Taylor, Ph. D.
Department of Psychology E-mail: [EMAIL PROTECTED]
University of San Diego Voice: (619) 260-4006
5998 Alcala Park
San Diego, CA 92110
"Education is one of the few things a person
is willing to pay for and not get."
-- W. L. Bryan
