480 
Dr Duckworth, Report on the brain of a 
The Encephalon. (Figs. 1 — 7 incl.) 
General and Surface Anatomy. 
The general characters of the encephalon are foreshadowed 
by those of the calvaria. The cerebrum is microcephalic and 
asymmetrical : though the cerebellum, while smaller than usual, 
is not in this respect, so anomalous as the cerebrum. The latter 
(when first removed from the skull) weighed only 550 gm. 
In length, the right hemisphere measures 122 mm., the 
corresponding dimension of the left hemisphere being 128 mm. 
But a prolonged sojourn in alcohol has caused shrinkage, so that 
the dimensions of cerebrum and calvaria no longer correspond 
(cf. the endocranial measurements). The cerebral width is now 
also less than that of the endocranium, and measures 91 mm. only, 
of which the right hemisphere provides 45 mm., and the left 
hemisphere 46 mm. In maximum height, the right hemisphere 
measures 75 mm., the left measuring 79 mm. The latter hemi- 
sphere is thus the larger in each diameter. 
The proportions of the hemispheres, before and behind the 
corpus callosum, may be exhibited in the following way : 
Bight hemisphere 31 (25-6%) 53-5 (44-2 0 / o ) 36-5 (30-2°/ o ) 122 
Left hemisphere 33 (25-8°/ 0 ) 52i(40'6°/ o ) 43-5 (33-6°/ 0 ) 128-5 
The comparison of these results with the data provided by 
Cunningham and Telford-Smith in their descriptions of micro- 
cephalic brains ( Scientific Transactions of the Royal Dublin Society, 
Vol. v. Series II.) reveals the character common to such cerebra, 
viz. reduction of the occipital lobe. But in the present specimen 
not only reduction in proportions, but also destruction of sub- 
stance had occurred in the right hemisphere, as will be described 
presently. 
The corpus callosum is well shewn in section in each half of the 
cerebrum, and at once attracts attention through the remarkable 
attenuation of the splenial end. This character will be dealt with 
further in a later connexion. 
The sulci and gyri are simple and uncomplicated. On a first 
inspection it can be seen that the insula was exposed in each 
hemisphere. The temporal lobes are remarkably deficient in 
normal sulci, though shallow grooves occur, and lend a puckered 
or rugose appearance to the cortex of this region in both hemi- 
spheres. 
Anterior to 
corpus callosum 
Corpus callosum 
Posterior to 
corpus callosum 
Total 
1 Owing to distortion and shrinkage since the cerebrum was divided. 
