EurekaMag.com logo
+ Site Statistics
References:
47,893,527
Abstracts:
28,296,643
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Electrophysiological study of the hypothalamic projection of noxious afferents from the dental pulp


, : Electrophysiological study of the hypothalamic projection of noxious afferents from the dental pulp. Fiziologicheskii Zhurnal (Kiev) 30(5): 579-586

Noxious evoked potentials to electrical stimulation of dental pulp were recorded from lateral and medial areas of the posterior, tuberal and anterior hypothalamus in cats anesthetized with the mixture of choralose and nembutal (45 and 15 mg/kg, respectively). In case of monopolar recording responses of the maximal amplitude and shortest latency were recorded in the posterior hypothalamus (focus of maximal activity). In the tuberal hypothalamus the noxious evoked potentials had a somewhat longer latency and a lower amplitude. In the anterior hypothalamus the responses had the lowest amplitude and longest latency. In case of bipolar recording evoked potentials of maximal amplitude and shortest latency were also localized in the posterior hypothalamus. Throughout the lateral hypothalamus nociceptive responses were of shorter latency than the potentials of medial hypothalamic structures. Hypothalamic nociceptive response were suppressed at low frequency of stimulation (1.25/s) and were characterized by a long recovery cycle (1500 ms). In microelectrophysiological experiments, the nociresponsive neurons of the posterior hypothalamus were found to receive convergence input from nonnociceptive A.beta. afferents of the sciatic nerve.


Accession: 005349855

Submit PDF Full Text: Here


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Related references

Baklavadzhian, O.G.; Darbinian, A.G.; Taturian, I.Kh., 1984: Electrophysiological study of the hypothalamic projection of nociceptive afferents of the dental pulp. Fiziologicheskii Zhurnal 30(5): 579-586

Zhong, S.N.; Huang, Z.S., 1988: Electrophysiological study of medullary projection of the abdominal vagal and greater splanchnic afferents in the rabbit. Experiments were performed on 75 rabbits. The distribution, latency and response pattern from the abdominal vagus and greater splanchnic afferents in the bulbar medulla were observed. The evoked medullary unit discharges elicited by stimulation of...

Steriade, M.; Parent, A.; Ropert, N.; Kitsikis, A., 1982: Zona incerta and lateral hypothalamic afferents to the midbrain reticular core of cat--HRP and electrophysiological study. The zona incerta (ZI) and lateral hypothalamic afferents to the midbrain reticular formation (MRF) of cat were investigated with the horseradish peroxidase (HRP) technique and by using antidromic identification in experiments on chronically implan...

Ito, K.; Sato, A.; Shimamura, K.; Swenson, R.S., 1984: Convergence of noxious and non-noxious cutaneous afferents and baroreceptor afferents onto single adrenal sympathetic neurons in anesthetized rats. Single units of the adrenal sympathetic nerve (n = 46) were dissected and characterized with respect to tonic discharge and response to cutaneous and baroreceptor stimulation. The frequency of tonic discharge averaged 1.6 Hz and cardiovascular rhy...

Dostrovsky, J.O., 1984: An electrophysiological study of canine, premolar and molar tooth pulp afferents and their convergence on medullary trigeminal neurons. The two main aims of this study were (1) to compare the conduction velocities of tooth pulp (TP) afferents innervating the cat canine, premolar and molar teeth and (2) to determine the degree of convergence of afferent input originating in these d...

Baklavadzhian, O.G.; Astvatsatrian, E.G., 1973: Comparative electrophysiological study of the hypothalamic projection of the afferent systems of the splanchnic and sciatic nerves. Fiziologicheskii Zhurnal SSSR Imeni I. M. Sechenova 59(9): 1326-1336

Woda, A.; Azerad, J.; Guilbaud, G.; Besson, J.M., 1975: A microphysiologic study of thalamic projection of the cat's dental pulp. (1) A similar proportion of cells in the VPM (24.7%), MGmc (24%), CM (26.8%) and CL (28.6%) is activated by electrical stimulation of the cat's dental pulp. However the thresholds are very different, cells belonging to the first group of the...

Vyklický, L.; Keller, O., 1973: Central projection of tooth pulp primary afferents in the cat. Stimulation of the tooth pulp nerve, consisting of A-delta fibers, produces field potentials in the rostal subdivision of the nucles, tractus spinalis n. trigmini. Antidromic action potentials from the A-delta fibers of the tooth pulp nerve, and i...

Keller O.; Andersson S.A.; Ross A.; Rydenbag B., 1978: Characteristics of the cortical projection from tooth pulp afferents in the cat. Physiologia Bohemoslovaca 27(6): 546-547

Keller, O.; Kalina, M.; Ujec, E.; Zivný, A.; Vyklický, L., 1981: Projection of tooth pulp afferents to the brainstem and to the cortex in the cat. The projection of tooth pulp afferents in the spinal trigeminal nucleus (N.V.sp.) and the effect of dorsolateral medullotomy on cortical potentials evoked by electrical stimulation of Adelta tooth pulp nerve fibres were studied in cats. It was con...