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Mechanisms for selection of basic motor programs--roles for the striatum and pallidum.
Grillner S, Hellgren J, Ménard A, Saitoh K, Wikström MA. Grillner S, et al. Among authors: menard a. Trends Neurosci. 2005 Jul;28(7):364-70. doi: 10.1016/j.tins.2005.05.004. Trends Neurosci. 2005. PMID: 15935487 Review.
The neural mechanisms responsible for selecting which motor program should be recruited at a given instant are the focus of this review. ...It is argued that the striatum has a prominent role in selecting which motor program should be called into action....
The neural mechanisms responsible for selecting which motor program should be recruited at a given instant are the focus of this revi …
Diencephalic locomotor region in the lamprey--afferents and efferent control.
Ménard A, Grillner S. Ménard A, et al. J Neurophysiol. 2008 Sep;100(3):1343-53. doi: 10.1152/jn.01128.2007. Epub 2008 Jul 2. J Neurophysiol. 2008. PMID: 18596192
To show that actual locomotor movements are produced from DLR, we use a semi-intact preparation in which the brain stem is exposed and the head fixed, while the body is left to generate actual swimming movements. ...
To show that actual locomotor movements are produced from DLR, we use a semi-intact preparation in which the brain stem is exposed an …
GABA distribution in lamprey is phylogenetically conserved.
Robertson B, Auclair F, Ménard A, Grillner S, Dubuc R. Robertson B, et al. Among authors: menard a. J Comp Neurol. 2007 Jul 1;503(1):47-63. doi: 10.1002/cne.21348. J Comp Neurol. 2007. PMID: 17480011
GABA-immunoreactive cells were organized in a virtually identical manner in the two species. They were found throughout the brain, with the following regions being of particular interest: the granular cell layer of the olfactory bulb, the nucleus of the anterior commissure …
GABA-immunoreactive cells were organized in a virtually identical manner in the two species. They were found throughout the brain, wi …
Tectal control of locomotion, steering, and eye movements in lamprey.
Saitoh K, Ménard A, Grillner S. Saitoh K, et al. Among authors: menard a. J Neurophysiol. 2007 Apr;97(4):3093-108. doi: 10.1152/jn.00639.2006. Epub 2007 Feb 15. J Neurophysiol. 2007. PMID: 17303814
The intrinsic function of the brain stem-spinal cord networks eliciting the locomotor synergy is well described in the lamprey-a vertebrate model system. ...In a rostromedial area, bilateral downward vertical eye movements occurred. In a caudomedial tectal ar …
The intrinsic function of the brain stem-spinal cord networks eliciting the locomotor synergy is well described in the lamprey-a vert …
Descending GABAergic projections to the mesencephalic locomotor region in the lamprey Petromyzon marinus.
Ménard A, Auclair F, Bourcier-Lucas C, Grillner S, Dubuc R. Ménard A, et al. J Comp Neurol. 2007 Mar 10;501(2):260-73. doi: 10.1002/cne.21258. J Comp Neurol. 2007. PMID: 17226790
The mesencephalic locomotor region (MLR) plays a significant role in the control of locomotion in all vertebrate species investigated. ...Electrophysiological experiments were also carried out to examine the effects of GABA agonists and antagonists injected into the MLR in …
The mesencephalic locomotor region (MLR) plays a significant role in the control of locomotion in all vertebrate species investigated …
Afferents of the lamprey optic tectum with special reference to the GABA input: combined tracing and immunohistochemical study.
Robertson B, Saitoh K, Ménard A, Grillner S. Robertson B, et al. Among authors: menard a. J Comp Neurol. 2006 Nov 1;499(1):106-19. doi: 10.1002/cne.21078. J Comp Neurol. 2006. PMID: 16958107
On the basis of these double-labelling experiments, it was shown that the optic tectum receives a GABAergic input from the caudoventral part of the medial pallium, the dorsal and ventral thalamus, the nucleus of M5, and the torus semicircularis. ...
On the basis of these double-labelling experiments, it was shown that the optic tectum receives a GABAergic input from the caudoventr …
Forebrain dopamine depletion impairs motor behavior in lamprey.
Thompson RH, Ménard A, Pombal M, Grillner S. Thompson RH, et al. Among authors: menard a. Eur J Neurosci. 2008 Mar;27(6):1452-60. doi: 10.1111/j.1460-9568.2008.06125.x. Epub 2008 Mar 10. Eur J Neurosci. 2008. PMID: 18336565
The lamprey striatum contains the same cellular elements as found in mammals, and receives the same types of input, including a prominent dopamine innervation. We show here that MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine; 100 mg/kg i.p.), a neurotoxin, deple …
The lamprey striatum contains the same cellular elements as found in mammals, and receives the same types of input, including a promi …
Sparse but selective and potent synaptic transmission from the globus pallidus to the subthalamic nucleus.
Baufreton J, Kirkham E, Atherton JF, Menard A, Magill PJ, Bolam JP, Bevan MD. Baufreton J, et al. Among authors: menard a. J Neurophysiol. 2009 Jul;102(1):532-45. doi: 10.1152/jn.00305.2009. Epub 2009 May 20. J Neurophysiol. 2009. PMID: 19458148 Free PMC article.
Although the GP is a key determinant of STN activity, correlated GP-STN activity is rare under normal conditions. Here we define fundamental features of the GP-STN connection that contribute to poorly correlated GP-STN activity. ...
Although the GP is a key determinant of STN activity, correlated GP-STN activity is rare under normal conditions. Here we define fund …
Sensory integration in presynaptic inhibitory pathways during fictive locomotion in the cat.
Ménard A, Leblond H, Gossard JP. Ménard A, et al. J Neurophysiol. 2002 Jul;88(1):163-71. doi: 10.1152/jn.2002.88.1.163. J Neurophysiol. 2002. PMID: 12091542
PADs were evoked by stimulating alternatively low-threshold afferents from a flexor nerve, a cutaneous nerve and a combination of both. ...PADs evoked by muscle stimuli alone showed a significant phase-dependent modulation in 20/31 group I afferents. I …
PADs were evoked by stimulating alternatively low-threshold afferents from a flexor nerve, a cutaneous nerve and a comb …
Initiation of locomotion in lampreys.
Dubuc R, Brocard F, Antri M, Fénelon K, Gariépy JF, Smetana R, Ménard A, Le Ray D, Viana Di Prisco G, Pearlstein E, Sirota MG, Derjean D, St-Pierre M, Zielinski B, Auclair F, Veilleux D. Dubuc R, et al. Among authors: menard a. Brain Res Rev. 2008 Jan;57(1):172-82. doi: 10.1016/j.brainresrev.2007.07.016. Epub 2007 Aug 22. Brain Res Rev. 2008. PMID: 17916380 Review.
We have shown that reticulospinal cells have intrinsic membrane properties that allow them to transform a short duration sensory input into a long-lasting excitatory command that activates the spinal locomotor networks. ...It activates reticulospinal cells to elicit …
We have shown that reticulospinal cells have intrinsic membrane properties that allow them to transform a short duration sensory inpu …
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