Abstract：
:In a previous study we have demonstrated the existence of pulvinar (puv) cells which were optimally activated when a monkey executed reaching movements with his limbs (Acuña et al 1983). We now describe further observations in four Macaca nemestrina monkeys trained to perform goal directed reaching movements aimed at four different positions in space. Extracellular unit activity in the lateralis posterior (lp) and puv nuclei, together with electrooculograms were recorded during the execution of the task. Seven hundred and sixty neurons were studied in the lp-puv complex. One hundred and twenty three cells (16%) showed changes in activity related to the reaching movements. Reaching related cells fell into two categories: goal direction sensitive (28/123 = 23%) and pandirectional (95/123 = 77%). Goal direction sensitive cells showed different responses depending on the direction of the goal relative to the starting point of the movement. The responses of the pandirectional cells were independent of goal direction. The activity of the remaining cells (637/760) could not be correlated with reaching movements. In a smaller number of area 5a (PE) cells (n = 109) studied in one monkey, 82 (75%) were classified as reaching related cells. Of these, 76% (62/82) were goal direction sensitive and 24% (20/82) pandirectional. The lp-puv cells were more dependent on the intentionality of movement than area 5a cells, and not reliably activated by passive manipulation of the limb. After injection of HRP-WGA in area 5a, where the reaching cells were recorded, labeled cells and terminals were located in the lp-puv zones where reaching cells were also found.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Acuña C,Cudeiro J,Gonzalez F,Alonso JM,Perez Rdoi
10.1007/BF00230847subject
Has Abstractpub_date
1990-01-01 00:00:00pages
158-66issue
1eissn
0014-4819issn
1432-1106journal_volume
82pub_type
杂志文章abstract：:Force and electromyogram (EMG) responses of the medial gastrocnemius muscle were assessed during isometric contractions in 8 decerebrate cat preparations, before and after acute dorsal hemisection of the spinal cord at the T12 level. The measures derived included the relation between static force and mean rectified EM...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00247497
更新日期：1988-01-01 00:00:00
abstract：:Head-fixed gaze shifts were evoked by electrical stimulation of the deeper layers of the cat superior colliculus (SC). After a short latency, saccades were triggered with kinematics similar to those of visually guided saccades. When electrical stimulation was maintained for more than 150-200 ms, postsaccadic smooth ey...
journal_title：Experimental brain research
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journal_title：Experimental brain research
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237586
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journal_title：Experimental brain research
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00248749
更新日期：1988-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
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更新日期：1997-04-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
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更新日期：1989-01-01 00:00:00
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更新日期：2008-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00235016
更新日期：1976-01-26 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
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更新日期：1978-09-15 00:00:00
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pub_type： 杂志文章
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更新日期：1999-06-01 00:00:00
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pub_type： 杂志文章
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更新日期：1993-01-01 00:00:00
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pub_type： 临床试验,杂志文章,随机对照试验
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更新日期：1995-01-01 00:00:00
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更新日期：1990-01-01 00:00:00
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