. On Cerebral Anaemia and the Effects Which Follow Ligation of the Cerebral Arteries . ; there results a fit, then extensorspasm and respiratory paralysis. The cortex is excitable during the extensor stimulating the arm area the extension Is increased. The excitability vanishedwithin 1 minute after the failure of respiration. Note.—The monkey had diarrhoea ; the room was very cold, and the brain was notprotected with warm wool pads. VI. Bonnet Monkey (about 4 years of age). The extensor carpi radialis is connected with an isometric lever, and its contractionsrecorded. The arm area is
. On Cerebral Anaemia and the Effects Which Follow Ligation of the Cerebral Arteries . ; there results a fit, then extensorspasm and respiratory paralysis. The cortex is excitable during the extensor stimulating the arm area the extension Is increased. The excitability vanishedwithin 1 minute after the failure of respiration. Note.—The monkey had diarrhoea ; the room was very cold, and the brain was notprotected with warm wool pads. VI. Bonnet Monkey (about 4 years of age). The extensor carpi radialis is connected with an isometric lever, and its contractionsrecorded. The arm area is exposed, and the carotids prepared. Strength of currentjust distinctly perceptible to tongue. Contraction of the muscle is obtained byexciting the upper part of the arm area just in front of the fissure of Rolando. Onclamping the carotids, the brain becomes very anaemic and collapses, and the centrebecomes inexcitable. The excitability returns so soon as the clamps are removed. vol. cxoiii.—b. o 98 MR. L. HILL ON CEREBRAL. ANAEMIA AND THE &4 © 4-3 ©o 4^> ? © d o 03. o T3 © Pw o to • i—i ?4-3 o u Q Q ^Q if o O o 3 P3 -+-3 © «4-l O cS © to 3 0 to feD ^ 4-3 O rP 4-3 Pi o © COO a ?-( O © *4-f i— T5 © r2 ^ J*? ©J* Po •r-f cS4-3 - - r—1 4-3 © «4-lO & x o ©Pm © H © CM *-* O 2 a - ^ o r5 4^ .s ! © +3 co «—s •1-1 cs 4-3 <•§ --d ^3 © cS bo 43O© PP O © co £r *r-< 1—4 •r-JP4fH © O CO p© 4» EFFECTS WHICH FOLLOW LIGATION OF THE CEREBRAL ARTERIES, 99 VII. Young and Vigorous Bonnet Monkey. Extensor carpi radialis connected with isometric lever. CWotids prepared;cannula placed in jugular vein ; arm area of cortex exposed. Marked contractionsare obtained on exciting the upper arm area just in front of the fissure of is no difference in excitability after clamping both carotids, although thebrain is exsanguined and collapsed. Excitations, with the carotids clamped or notclamped, are repeated several time
Size: 952px × 2626px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectproceed, bookyear1900
