294 



REPORTS ON THE STATE OP SCIENCE. 



nerve of mastication, opposite page 118 of the 'Dissertation,' is as 



follows : — 



Nervus 

 Oeigo . 

 Tkuncus 

 Rami . 



SURCULI 



Fasciculi 



Insertion es 



Usus (page 177) 



Portio minor quinti paris, vel nervus masticatorius. 



A cruribus cerebelli. 



Crotaphiticus et Buccinatorius. 



Plexus gangliof. cum Maxillari inleriori. 



(a) — Massetericus. 



(6) — Crotaphiticus. 



(c) — Buccinatorius. 



(d) — Pterygoideus. 



(a) — In piures fasciculos. 



(6) — Fasciculus cxternus. 



Fasciculus internus. 

 (f) — Musculares. 



Glandulares. 



Buccalis. 



Bucco-labialis. 

 (it) — In articulationem maxillar., m. tcmporalcm, massetericum. 

 (6) — In rlbras externas musculi crotaphitici. 

 (c) — In mediam, et anteriorem partem musculi crotaphitici. 



In umsculos pterygoideos, et musculum temporalem. 



In duetum stenonianum, ct glandulas buccales. 



In musculum buccinatorium. 



In musculum buccinatorem, caninum et triangularem. 

 (d) — In museulos pterygoideos. 



Spectat igitur portio minor quinti paris ad nervos vitse animalis 

 et quidem ad nervos motorios ; nullibi enim sensibus pneest, 

 et habita ratione ipsius officii, nervus masticatorius esset 

 dicendus. 



2. Maya's Commentaries. — Herbert Mayo, in his publications of 

 1822-23 (' Anatomical and Physiological Commentaries,' No. 1, August 

 1822 ; No. 2, July 1823), made a distinct contribution to our clearer 

 knowledge of the fifth and seventh nerves, which is duly recognised in 

 the ' Report to the British Association ' of 1833. 



Mr. Herbert Mayo, in the admirable essay already referred to, was the first 

 to point out the true relations of the fifth and seventh nerves. 



His results were tacitly accepted by Bell and incorporated without 

 acknowledgment in. the ' Exposition ' of 1824 and in the subsequent 

 editions 1830 and 1836 of Bell's 'Nervous System,' which are the 

 sources from which all subsequent accounts have been taken. This 

 matter deserves to be rectified by reference to the original documents 

 of 1821-22. 



Mayo in the first number of his ' Commentaries ' (1882) at p. 112 

 concludes from his experiments that in the ass the portio dura is a 

 simple nerve of voluntary motion; that the frontal, infraorbital, and 

 inferior maxillary branches of the fifth, are nerves of sensation only; 

 and that other branches of the third division of the fifth are voluntary 

 nerves to the pterygoid, the masseter, the temporal, and the buccinator 

 muscles. He rejects Bell's description of the defective prehension by an 

 ass after section of the superior maxillary branch of the fifth as being 

 obviously due to want of motion, and attributes the defect to loss of 

 sensation. (N.B. — Bell accepted the correction by altering the descrip- 

 tion of the experiment in later editions of his ' Nervous System ' from 



