Abstract

References
1.
Fraser
. Journ. of Physiol., Lond. , 1901-2 , xxvii , p. 372 .
2.
Holmes
Gordon
, and
May Page
Proc. Roy. Soc. Med. , 1909 , ii (Neurol. Sect., p. 92 ); and Brain, Lond., 1909 , xxxii, p. 1.
3.
Horsley
, and
Clarke
Brain , 1905 , xxviii , p. 13 .
4.
Mott
. Brain , 1895 , xviii , p. 16 .
