Prompt diagnosis without delay and intimate follow-up is the key for the treatment of a carotid injury. Those patients who exhibit cervical bruits and/or seat-belt signs should be examined aggressively. Angioplasty with stents is amenable for patients with traumatic carotid dissections requiring vascular reconstruction in the acute stage.

Phylogenetically, the so-called cerebral olfactory system in the wider sense seems to have morz to do with the vegetative function than as a system for somatic sensation. Concerning amygdala, Herrick assumed from his study on Amphibia that.

Trigeminal mesencephalic (Mes V) neurons innervating the periodontal mechanoreceptor ( PMR) are known to play an important role in controlling the bite force and jaw-movements during mastication.After teeth loss, the PMR disappears due to loss of the periodontal membrane. The present work is a study on whether cell death is induced in the Mes V neurons in association with teeth loss. The upper and lower incisors were extracted on the right side in 5 guinea pigs (extraction group) and the other 5 guinea pigs were kept intact (control group) . In the extraction group, the animals were kept alive for 58-119 days after teeth extraction. Serial coronal sections (50pm thick) were made of the midbrain and pons and stained with cresyl violet. The Mes V neurons were counted on every other section. In the caudal half of the Mes V nucleus, where the neurons innervating the PMR are reported to be located, the number of neurons was less on the right side than on the left side (P (0.01) in the extraction group, while there was no difference between the right and left sides in the control group. We conclude that teeth extraction can induce cell death in the Mes V neurons innervating the PMR and produce a significant change in the brainstem mechanisms controlling mastication.

Experiments on the miygdaloid complex of the cnt and rabbit in our laboratory have shown that the main amyydaloid nuclei and surrounding cortex are associated with the respiratory movements (29 . Further observation made it possible to say that certain nuclear group of the amygdaloid complex is really referred to the vegetative function in several respect. The present article is devoted to a n anslysis of experiments concerning body temperature and gastrointestinal motility in cat. I. Results on body temperatureA s to the reguhtory centre of the body temperature a number of researches have been presented ever since the famous experiment o f ilYo)Jsot2 and Snrizs I 18851 w h o recognized elevation of the tempzriture of the animal body produced by puncturing the anterior part of the c:iudate nucleus. Experimental results reported by O t t (1884 89 . Ricliet i18851. Wliiie i1890), Brunin)i i1929) a. 0. a r e n o t inconip.itible with the result of Aroiisohn and Snclzs, while some aiithors. nsmely Christinrii ~1 8 8 5 )~ Riclzei \ 18851, Bnculo (1890), ilzscmint 119Wi, Sirecrnth (19101 a. 0. indicated the thalamus opticus ;IS another effective area and other authors as Eztlekiburg rind Lniidois f 1876 I , W h i t e (1891 I a. o recognized hyperthermia in case of 1w:ilized cortical lesion. Attentims were, however, concentrated recently upon the hy-aothalmius by niriny authors, for example f sciischiizicl ind S c l z t~i~ z l c r I 19141, Rn)iso)z et 31. I 1935-431, h'nrplzts and K r c i d l (1909 11 I , h-uroiszc et al. i 1938 401, Bnzeit, A l p e r s and E r b (19331, Frnzier, A l p e r s and Leicig 119361 etc. We recognized alteration of the body temperature through electrical or chemical stimulation of a limited part of amygddla in the ~~~ ~ ~ ~ ~~ ~ heceived for publication, June 30, 1952.

No abstract