Summary
Lateral and medial thalamus are traditionally thought to have separate roles in pain processing, with lateral lemniscal regions transmitting discriminative information about location and intensity, while medial nonspecific regions are involved in emotional responses. Contrary to this view, the present study shows that some single neurons in medial thalamus of alert monkey discriminate changes in the intensity of noxious stimuli that are equal to or below the monkey's own discrimination threshold. Since these neurons are also modulated by anesthesia and attentional factors, we suggest that parts of medial thalamus may participate in both discriminative and affective dimensions of pain.
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References
Albe-Fessard D, Kruger L (1962) Duality of unit discharges from cat centrum medianum in response to natural and electrical stimulation. J Neurophysiology 25:3–20
Benabid AL, Henriksen SJ, McGinty JF, Bloom FE (1983) Thalamic nucleus ventro-postero-lateralis inhibits nucleus parafascicularis response to noxious stimuli throught a nonopioid pathway. Brain Res 280:217–231
Bushnell MC, Duncan GH, Dubner R, Jones RL, Maixner W (1985) Attentional influences on noxious and innocuous cutaneous heat detection in humans and monkeys. J Neurosci 5:1103–1110
Bushnell MC, Duncan GH (1987) Mechanical response properties of ventroposterior medial thalamic neurons in the alert monkey. Exp Brain Res 67:603–614
Casey KL (1966) Unit analysis of nociceptive mechanisms in the thalamus of the awake squirrel monkey. J Neurophysiol 29:727–750
Dong WK, Ryu H, Wagman IH (1978) Nociceptive responses of neurons in the medialthalamus and their relationship to spinothalamic pathways. J Neurophysiol 41:1592–1613
Gracely RH, McGrath P, Dubner R (1978) Validity and sensitivity of ratio scales of sensory and affective verbal pain descriptors: manipulation of affect by diazepam. Pain 5:19–29
Hassler R (1970) Title In: Hassler R, Walker AE (eds) Trigeminal neuralgia. Saunders, Philadelphia, pp 123–138
Jones EG (1985) The thalamus. Plenum Press, New York
Jones EG, Seavitt RY (1974) Retrograde axonal transport and demonstration of non-specific projections to cerebral cortex and striatum from thalamic intralaminar nuclei in rat, cat and monkey. J Comp Neurol 154:349–378
Kaelber WW, Mitchell CL, Yarmat AJ, Afifi AK, Lorens SA (1975) Centrum medianum-parafascicularis lesions and reactivity to noxious and non-noxious stimuli. Exp Neurol 46:282–290
Kaufman EFS, Rosenquist AC (1985) Efferent projections of the thalamic intralaminar nuclei in the cat. Brain Res 335:257–280
Kenshalo DR, Giesler GJ, Leonard RB, Willis WD (1980) Responses of neurons in primate ventral posterior lateral nucleus to noxious stimuli. J Neurophysiol 43:1594–1614
Marburg DL (1973) The effect on reaction to painful stumuli of lesions in the centromedian nucleus in the thalamus of the monkey. Int J Neurosci 5:153–158
Mark VH, Ervin RF, Yakoviev PI (1963) Stereotactic thalamotomy. Arch Neurol 8:528–538
Melzack R, Casey KL (1968) Sensory, motivational and central control determinants of pain: a new conceptual model. In: Kenshalo DR (ed) The skin senses. Thomas, Springfield Ill, pp 423–443
Olszewski, J (1952) The thalamus of the Macaca mulatta. Karger, Basel
Pearl GS, Anderson KV (1980) Responses of cells in feline nucleus centrum medianum to tooth pulp stimulation. Brain Res Bull 5:41–45
Perl ER, Whitlock DG (1961) Somatic stimuli exciting spinothalamic projections to thalamic neurons in cat and monkey. Exp Neurol 3:256–296
Peschanski M, Guilbaud G, Gautron M (1981) Posterior intralaminar region in rat: neuronal responses to noxious and nonnoxious cutaneous stimuli. Exp Neurol 72:226–238
Price DD, Harkins SW, Rafii A, Price C (1986) A simultaneous comparison of fentanyl's analgesic effects on experimental and clinical pain. Pain 24:197–203
Talbot JD, Duncan GH, Bushnell MC, Boyer M (1987) Diffuse noxious inhibitory controls (DNICs): psychophysical evidence in man for intersegmental suppression of noxious heat perception by cold pressor pain. Pain 30:221–232
White JC, Sweet WH (1969) Pain and the neurosurgeon: a forty-year experience. Thomas, Springfield Ill
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Bushnell, M.C., Duncan, G.H. Sensory and affective aspects of pain perception: is medial thalamus restricted to emotional issues?. Exp Brain Res 78, 415–418 (1989). https://doi.org/10.1007/BF00228914
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DOI: https://doi.org/10.1007/BF00228914