Organic and functional nervous diseases; a text-book of neurology . as the sniffing of an odor or a sneeze, the turning ofthe eyes and head toward an object seen, the winking caused by dustin the eye; the motions of the face in smiling, frowning, or crying;the pose of the head in listening, or quick turning toward a sound, ora start with winking at a noise; the involuntary swallowing of salivaor of tasting food, and the acts of respiration and coughing. Each cranial nerve is also connected with the higher centres of thebrain. Some are joined directly to the brain cortex. The majorityhave an in
Organic and functional nervous diseases; a text-book of neurology . as the sniffing of an odor or a sneeze, the turning ofthe eyes and head toward an object seen, the winking caused by dustin the eye; the motions of the face in smiling, frowning, or crying;the pose of the head in listening, or quick turning toward a sound, ora start with winking at a noise; the involuntary swallowing of salivaor of tasting food, and the acts of respiration and coughing. Each cranial nerve is also connected with the higher centres of thebrain. Some are joined directly to the brain cortex. The majorityhave an indirect connection, the tract from the primary centre to thecortex being interrupted in the basal ganglia. This interruption isfor thie purpose of providing for the numerous unconscious and invol-untary automatic acts of high complexity which involve the coordi-nated action of numerous widely separated centres. In studying the cranial nerves it is evident, then, that a sharp dis-tinction must be made between diseases in the peripheral part of th^ 622 PLATE XXV y^.. Showing the distribution of the fifth, seventh and eleventh cranial nerves and thecervical and brachial plexuses ; also the area of the middle meningeal artery in the innertable of the skull, injury to which is sometimes the cause of hemiplegia; also the courseof the bloodvessels in the neck and face. (Arnolds Atlas.) TKE CRANIAL NERVES. 623 nerve, diseases in the primary centres of the nerve, diseases in the intra-cerebral tracts of the nerve, and diseases of the secondary or corticalcentres of the nerve. In this section the diseases of the peripheral Fig. 261.
Size: 1411px × 1770px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectnervoussystem, bookye
