Arm-movement-related neurons in the primate superior colliculus and underlying reticular formation: comparison of neuronal activity with EMGs of muscles of the shoulder, arm and trunk during reaching.

Arm-movement-related neurons in the primate superior colliculus and underlying reticular formation: comparison of neuronal activity with EMGs of muscles of the shoulder, arm and trunk during reaching. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

Arm-movement-related neurons in the primate superior colliculus and underlying reticular formation: comparison of neuronal activity with EMGs of muscles of the shoulder, arm and trunk during reaching. Abstract Text:

W Werner,S Dannenberg,K P Hoffmann,

Neuronal activity was recorded from the superior colliculus (SC) and the underlying reticular formation in two monkeys during an arm reaching task. Of 744 neurons recorded, 389 (52%) clearly modulated their activity with arm movements. The temporal activity patterns of arm-movement-related neurons often had a time course similar to rectified electromyograms (EMGs) of particular muscles recorded from the shoulder, arm or trunk. These reach cells, as well as the muscles investigated, commonly exhibited mono- or biphasic (less frequently tri- or polyphasic) excitatory bursts of activity, which were related to the (pre-)movement period, the contact phase and/or the return movement. The vast majority of reach cells exhibited a consistent activity pattern from trial to trial as did most of the muscles of the shoulder, arm and trunk. Similarities between the activity patterns of the neurons and the muscles were sometimes very strong and were especially notable with the muscles of the shoulder girdle (e.g. trapezius descendens, supraspinatus, infraspinatus or the anterior and medial deltoids). This high degree of co-activation suggests a functional linkage, though not direct, between the collicular reach cells and these muscles. Neuronal activity onset was compared with that of 25 muscles of the arms, shoulders and trunk. The majority of cells (78.5%) started before movement onset with a mean lead time of 149+/-90 ms, and 36.5% were active even before the earliest EMG onset. The neurons exhibited the same high degree of correlation (r=0.97, Spearman rank) between activity onset and the beginning of the arm movement as did the muscles (r=0.98) involved in the task. The mean neuronal reach activity (background subtracted) ranged between 7 and 193 impulses/s (mean 40.5+/-24.2). The mean modulation index calculated [(reach activity background activity)/reach activity+background activity)] was 0.75+/-0.23 for neurons (n=358) and 0.87+/-0.14 for muscles (n=25). As the monkeys fixated the reach target constantly during an arm movement, neuronal activity which was modulated in this period was not related to eye movements. The three neck muscles investigated in the reach task exhibited no reach-related activity modulation comparable to that of either the reach cells or the muscles of the shoulder, arm and trunk. However, tonic neck muscle EMG was monotonically related to horizontal eye position. The clear skeletomotor discharge characteristics of arm-movement-related SC neurons revealed in this study agree with those already known from other sensorimotor regions (for example the primary motor, the premotor and parietal cortex, the basal ganglia or the cerebellum) and are consistent with the possible role of this population of reach cells in the control of arm movements.

Arm-movement-related neurons in the primate superior colliculus and underlying reticular formation: comparison of neuronal activity with EMGs of muscles of the shoulder, arm and trunk during reaching. Publishing Authors By Initials

W Werner,S Dannenberg,KP Hoffmann,

For similar body regions: thorax research abstracts see: body regions: thorax research

PUBMED ID PMID:

MEDLINE DATE:

Arm-movement-related neurons in the primate superior colliculus and underlying reticular formation: comparison of neuronal activity with EMGs of muscles of the shoulder, arm and trunk during reaching. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Experimental brain research. Experimentelle Hirnfo

VOLUME: 115

Page Numbers: 191-205

Journal Abbreviation:

ISSN: 0014-4819

DAY: 15

MONTH: Jun

YEAR: 1997

Arm-movement-related neurons in the primate superior colliculus and underlying reticular formation: comparison of neuronal activity with EMGs of muscles of the shoulder, arm and trunk during reaching. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 43312

Arm-movement-related neurons in the primate superior colliculus and underlying reticular formation: comparison of neuronal activity with EMGs of muscles of the shoulder, arm and trunk during reaching. Keywords Mesh Terms:

KEYWORDS: Thorax

MESH TERMS: physiology

Chemical & Substance for Abstract: Arm-movement-related neurons in the primate superior colliculus and underlying reticular formation: comparison of neuronal activity with EMGs of muscles of the shoulder, arm and trunk during reaching. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for Arm-movement-related neurons in the primate superior colliculus and underlying reticular formation: comparison of neuronal activity with EMGs of muscles of the shoulder, arm and trunk during reaching.

AFFILIATION: Department of Zoology and Neurobiology, Ruhr University of Bochum, Germany.

Country: GERMANY

AGENCY:

GRANT:

ACRONYM:

MEDLINETA: Exp Brain Res

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

Arm-movement-related neurons in the primate superior colliculus and underlying reticular formation: comparison of neuronal activity with EMGs of muscles of the shoulder, arm and trunk during reaching Related Publications

• 1067.
• A homeostatic model of IkappaB metabolism to control constitutive NF-kappaB activity.
• A modified corner stitch for fixation of flap tips.
• A quantum mechanically guided view of Mg44Rh7.
• A randomised study of central versus peripheral intravenous nutrition in the perioperative period.
• Analysis of a Schnute postulate-based unified growth model for model selection in evolutionary computations.
• Analytic approaches to establish the diagnostic accuracy of coronary computed tomography angiography as a tool for clinical decision making.
• Are heterocygotes for classical homocystinuria at risk of vitamin B12 and folic acid deficiency?
• Characterizing phase-only fMRI data with an angular regression model.
• Comparison of anthropometric, area- and volume-based assessment of abdominal subcutaneous and visceral adipose tissue volumes using multi-detector computed tomography.
• Culture of primary human gingival fibroblasts on biodegradable membranes.
• Deficits of visual motion perception and optokinetic nystagmus after posterior suprasylvian lesions in the ferret (Mustela putorius furo).
• Detection of Aphanomyces astaci in North American crayfish by polymerase chain reaction.
• Extracurricular activities, athletic participation, and adolescent alcohol use: gender-differentiated and school-contextual effects.
• Impact of left ventricular lead position in cardiac resynchronization therapy on left ventricular remodelling. A circumferential strain analysis based on 2D echocardiography.
• Implementing telemonitoring in the daily routine of a GP practice in a rural setting in northern Germany.
• Noninvasive detection of coronary artery stenosis using 16-slice spiral CT: a comparison with selective X-ray coronary angiography.
• Pentane from thermal decomposition of lipoxidase-derived products.
• Preoperative ultrasonic assessment of thin melanocytic skin lesions using a 100-MHz ultrasound transducer: a comparative study.
• Presystemic signals in the control of thirst, salt appetite, and vasopressin secretion.
• QUANTUM MECHANICAL CALCULATION OF THE ELECTRONIC STRUCTURE OF DNA.
• Repeat liposuction-curettage treatment of axillary hyperhidrosis is safe and effective.
• Signal and noise of Fourier reconstructed fMRI data.
• Slug control in Australian canola: monitoring, molluscicidal baits and economic thresholds.
• Smad4 cooperates with lymphoid enhancer-binding factor 1/T cell-specific factor to increase c-myc expression in the absence of TGF-beta signaling.
• The adipokinetic hormones in the fall armyworm, Spodoptera frugiperda: cDNA cloning, quantitative real time RT-PCR analysis, and gene specific localization.
• The relationship between patient's perceived waiting time and office-based practice satisfaction.
• [Case report: total hip replacement for osteopetrosis ossificans. Femoral neck nonunion]
• [Pulmonary embolism: clinical relevance, requirements for diagnostic and therapeutic strategies]
• [Treatment of pneumothorax]