Artículos de revista

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    Long-lasting enhancement of rapid eye movement sleep and pontogeniculooccipital waves by vasoactive intestinal peptide microinjection into the amygdala temporal lobe
    (AMER ACAD SLEEP MEDICINE, 6301 BANDEL RD, STE 101, ROCHESTER, MN 55901 USA, 2003) Simón-Arceo, Karina; Ramírez-Salado, Ignacio; Calvo, José M.; Inst Nacl Psiquit Ramon de la Fuente, Div Invest Neurociencias, Dept Cronobiol, Caizada Mexico Xochimilco 101, Tlalpan 14370, Mexico.
    Study Objectives: The effect of a vasoactive intestinal peptide (VIP) microinjection into the amygdaloid central (CN) and basal nuclei (BN) on sleep organization and on the number and pattern of occurrence of pontogeniculooccipital (PGO) waves was analyzed. Design: One group of 8 cats was studied in baseline conditions and after the microinjection of two doses of VIP applied into the CN and BN. Setting: Sleep research laboratory. Participants and Interventions: Eight cats were prepared with sleep-recording electrodes and with guide tubes in both amygdalae for saline and VIP microinjections. Neuropeptide doses of 0.10mug/1mul (30muM) and 0.33mug/1mu1 (99.24muM) were employed. Measurements and Results: Once the microinjection was applied, 23-hour polygraphic sleep recordings were performed for 5 consecutive days. Concomitantly the PGO waves were tape-recorded on each day and computationally analyzed. Results show that the 0.10mug/1mul microinjection produced no change. Unilateral VIP 0.33mug/1mul injection into the CN provoked a significant and lasting increase in the percentage of slow-wave sleep with PGO waves. Bilateral application of VIP increased the percentage of slow-wave sleep with PGO waves and rapid eye movement sleep for 5 days. Bilateral microinjection of the neuropeptide into the BN only enhanced the percentage of slow wave sleep with PGO waves. For both amygdaloid nuclei, we observed that VIP increased the number and modified the PGO wave pattern of occurrence during slow-wave sleep with PGO waves and during rapid eye movement sleep. Conclusions: The VIP microinjection into both the CN and BN induces increased amounts of rapid eye movement sleep, PGO waves, and slow-wave sleep with PGO waves, having a more robust effect on all of these three variables when applied into the CN.
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    Effect of electrical stimulation of the nucleus of the solitary tract on the development of electrical amygdaloid kindling in the cat
    (WILEY-BLACKWELL, COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA, 2002) Magdaleno-Madrigal, Víctor M.; Valdés-Cruz, Alejandro; Martínez-Vargas, David; Martínez, Adrián; Almazán, Salvador; Fernández-Mas, Rodrigo; Fernández-Guardiola, Augusto; Univ Nacl Autonoma Mexico, Div Neurosci Res, SSA & Psychol Fac, Inst Nacl Psiquiatria, Calz Mexico Xochimilco 101, Mexico City 14370, DF, Mexico.; afernan@servidor.unam.mx
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    Preemptive effect of nucleus of the solitary tract stimulation on amygdaloid kindling in freely moving cats
    (Wiley-Blackwell, Commerce Place, 350 Main ST, Malden 02148, MA USA, 2010) Magdaleno-Madrigal, Víctor M.; Martínez-Vargas, David; Valdés-Cruz, Alejandro; Almazán-Alvarado, Salvador; Fernández-Mas, Rodrigo; Inst Nacl Psiquiatria Ramon de la Fuente Muniz, Lab Neurofisiol Control & Regulac, Direcc Invest Neurociencias, Calz Mexico Xochimilco 101, Mexico City 14370, DF, Mexico.; maleno@imp.edu.mx
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    Vagus nerve prolonged stimulation in cats: Effects on epileptogenesis (amygdala electrical kindling): Behavioral and electrographic changes
    (WILEY-BLACKWELL, COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA, 1999) Fernández-Guardiola, A.; Martínez, A.; Valdés-Cruz, A.; Magdaleno-Madrigal, V.M.; Martínez, D.; Fernández-Mas, R.; Inst Mexicano Psiquiatria, Mexico Xochimilco 101, Mexico City 14370, DF, Mexico.
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    Stimulation of the superior cerebellar peduncle during the development of amygdaloid kindling in rats
    (ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, 2004) Rubio, Carmen; Custodio, Verónica; Juárez, Francisco; Paz, Carlos; Inst Nacl Neurol & Neurocirug MVS, Dept Neurofisiol, Mexico City 14269, DF, Mexico; paztres@servidor.unam.mx
    Cerebellar manipulations have been used successfully in some intractable epileptic patients, however, their intrinsic mechanisms are not fully understood. To further clarify the cerebellar participation in epilepsy, we stimulated 10 rats with 100 Hz, 20 muA at the superior cerebellar peduncle (SCP) during amygdaloid kindling. Results were compared to 10 rats with an electrode placed at the SCP without stimulation and 10 rats without electrodes at the SCP used as control. We found that SCP stimulation increased the theta and alpha rhythms at the contralateral motor cortex. Such a stimulation produced hypertonicity of the forelimbs and tremor of the head. In this condition, we found that each of the behavioral stages during amygdaloid kindling in the SCP stimulated rats was reached earlier, while the amygdaloid electrographic after discharges (ADs) were longer during the first and shorter in the final trials as compared to controls. Moreover, amygdaloid ADs recorded exclusively during the behavioral stage-5 were significantly shorter than those recorded in the control conditions. We suggest that SCP stimulation Could change the Customary electrographic and convulsive expression of amygdala kindling in such a manner as to initially facilitate the limbic seizures and impede the secondary generalized seizures. (C) 2004 Elsevier B.V. All rights reserved.
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    EEG frequency and time domain mapping study of the cortical projections of temporal lobe amygdala afterdischarge during kindling in the cat
    (1992) Fernández-Mas, Rodrigo; Martínez, Adrián; Gutiérrez, Rafael; Fernández-Guardiola, Augusto; División de Neurociencias, Instituto Mexicano de Psiquiatría and Facultad de Psicología. U.N.A.M., México D.F., México
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    Amygdaloid kindling during rapid eye movement (REM) sleep in cats
    (1982) Calvo, José María; Alvarado, Raúl; Briones, Rafael; Paz, Carlos; Fernández-Guardiola, Augusto; Unidad de Investigaciones Cerebrales, lnstituto Nacional de Neurología Neurocírugia. lnsurgentes Sur No. 3877, Col. La Fama. Deleg. Tlalpan. 14410 México, D.F. y Facultad de Psicología, Universidad Nacional Autónoma de México, México, D.F.