The thing that makes the thalamus quite special is that itâs a relatively small, very concentrated area deep inside the brain, and a small change in the location of the stroke can produce a substantial change in how the stroke affects the survivor, Dr. Schmahmann said.
Ibid. (Latin, short for ibidem, meaning the same place) is the term used to provide an endnote or footnote citation or reference for a source that was cited in the preceding endnote or footnote. http://en.wikipedia.org/wiki/Ibid.
(ibid. p.49) as a citation in the text or a footnote means that this reference is to the same source as the one immediately before it. (Smith op.cit. p. 49) means that you've referred to the Smith book before, but there are references to other things between the first reference to Smith and this one.f you're using numerical references, then your first footnote or endnote has all the information in it. After that, it makes sense to use a shortened form of the footnote. So John Smith, , (London: Routledge, 1998) p. 23 can become Smith, Analysis p. 49 in the second note, or even Smith (1998) p. 49.