. Annual and analytical cyclopaedia of practical medicine . on of the spongy portionof the pars petrosa and of the processusmastoideum, and ossification of themembrana fenestrte rotundae; the liga-ment of the stapedius muscle was mov-able. The inner ear showed no sign ofpathological fluid or new surface of the brain showed no ab- DKAF-MUTISM. MORBID ANATOMY. 461 normality. Brocas convolution appearedsmaller than normal. The superior tem-poral convolution of the left side wasalso smaller than usual. The micro-scopical examination did not show anypositive signs of abnormality. The
. Annual and analytical cyclopaedia of practical medicine . on of the spongy portionof the pars petrosa and of the processusmastoideum, and ossification of themembrana fenestrte rotundae; the liga-ment of the stapedius muscle was mov-able. The inner ear showed no sign ofpathological fluid or new surface of the brain showed no ab- DKAF-MUTISM. MORBID ANATOMY. 461 normality. Brocas convolution appearedsmaller than normal. The superior tem-poral convolution of the left side wasalso smaller than usual. The micro-scopical examination did not show anypositive signs of abnormality. Thesecerebral changes are supposed to resultfrom atrophy consequent upon the in-activity of the parts, it being worthy of detailed , the middle earwas found to be normal, except for anhyperplasia and degeneration of thetensor tympani muscle. The labyrinthshowed atrophy of the nerves of thecochlea, sacculus, and posterior ampulla,as well as alterations in the membranousstructure of the cochlea and latter are simple anomalies of forma-. Auditory atrophy aud anomalies of development iu the membranous lahyiiiith of both earsin a case of deaf-mutism. {Scheibe.) Fig. 3.—r, Roseutlials canal ; la. lamina spiralis ossea; g, gangliou-eells; I, lacuna: nl, enter-ing nerve-fibres; n2, departing neive-libres ; 6, counective tissue. Fig. -4.—s, Semilunar stratum; c, crista spiralis; 6, basilar membrane; co, Cortis organ badlypreserved; p, prominentia spiralis; hr, bridge; I, lacuna in tlie stria vascularis; Ix, ridgewith attaelimeut to the lower part of the bridge ; ?«, rudimentary Corti membrane. (Zeitschrift fur Ohreuheilkunde.) note that this left-sided atrophy is asso-ciated with destruction of the rightlabyrinth. Conclusion that there isgood ground for the belief that thefibres of the acoustic nerve cross in thebrain. V. Uchermann (Annual, 93). Case of a deaf-mute, aged 47 years,who died of phthisis. As a result of tion. Deaf-mutism in this case must beregard
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