Simple Motor-Driven Sector-Disk

1962 ◽  
Vol 30 (7) ◽  
pp. v-vi
Author(s):  
Frederick L. Brown
Keyword(s):  
Simple Motor ◽  
Sector Disk

Sleep and motor learning

2020 ◽  
pp. 12-19
Author(s):  
Antonio Cicchella
Keyword(s):  
Motor Learning ◽  
Experimental Research ◽  
Human Body ◽  
Learning Process ◽  
Finger Tapping ◽  
Historical Overview ◽  
Motor Tasks ◽  
Sleep Habits ◽  
Simple Motor ◽  
Function Of Sleep

Sleep is a process, which happens in human body and has many functions. One relatively recently studied function of sleep is its involvement in the motor learning process. This paper presents a historical overview of the studies on sleep, and the results of two experimental research studies that explore the motor learning of a simple finger tapping tasks performed by adults, and the sleep habits of boys practicing sports. The research results show that sleep has an effect on improving motion retention of simple motor tasks, and that sports improve sleep for boys, thus contributing to better learning.

Cognitive Performance and Neuro-Metabolites in HIV using 3T Magnetic Resonance Spectroscopy: A Cross-Sectional Study from India

2020 ◽  
Vol 18 ◽  
Author(s):  
Kartik Gupta ◽  
Shivabalan ◽  
Virendra Kumar ◽  
Surabhi Vyas ◽  
RM Pandey ◽  
...  
Keyword(s):  
Cognitive Impairment ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Motor Skills ◽  
Cross Sectional Study ◽  
Resonance Spectroscopy ◽  
Sectional Study ◽  
Cross Sectional ◽  
Total N ◽  
Simple Motor

Background: Cognitive impairment in patients with human immunodeficiency virus (HIV) is associated with higher morbidity. The prevalence of and the metabolite changes in the brain associated with cognitive impairment in anti-retroviral therapy naïve patients with HIV is unknown. Objective: To estimate the prevalence of, and the neurometabolites associated with cognitive impairment in antiretroviral therapy (ART) naïve patients with HIV. Methods: We conducted a cross-sectional study among ART naïve patients with HIV aged 18-50 years in a tertiary care center in India. Cognition was tested using the Post Graduate Institute battery of brain dysfunction across five domains; memory, attentioninformation processing, abstraction executive, complex perceptual, and simple motor skills. We assessed the total N-acetyl aspartyl (tNAA), creatine (tCr) and glutamate + glutamine (Glx) using 3T magnetic resonance spectroscopy. Cognitive impairment was defined as an impairment in ≥2 domains. Results: Among 43 patients eligible for this study, the median age was 32 years (IQR 29, 40) and 30% were women. Median CD4 count and viral load were 317 cells/µL (IQR 157, 456) and 9.3 copies/ µL (IQR 1.4, 38), respectively. Impairment in at least one cognitive domain was present in 32 patients (74.4%). Impairment in simple motor skills and memory was present in 46.5% and 44% of patients, respectively. Cognitive impairment, defined by impairment in ≥2 domains, was found in 22 (51.2%) patients. There was a trend towards higher concentration of tNAA (7.3 vs. 7.0 mmol/kg), tGlx (9.1 vs. 8.2 mmol/kg), and tCr (5.5 vs. 5.2 mmol/kg) in the frontal lobe of patients with cognitive impairment vs. without cognitive impairment but it did not reach statistical significance (p>0.05 for all). There was no difference in the concentration of these metabolites in the two groups in the basal ganglia. Conclusions: There is a high prevalence of cognitive impairment in ART naïve patients with HIV. There is no difference in metabolites in patients with or without cognitive impairment. Further studies, with longitudinal follow-up, are required to understand the underlying pathophysiological mechanisms.

scholarly journals Free will and neurosurgical resections of the supplementary motor area: a critical review

2021 ◽  
Vol 163 (5) ◽  
pp. 1229-1237 ◽  
Author(s):  
Rickard L Sjöberg
Keyword(s):  
Executive Function ◽  
Free Will ◽  
Corticospinal Tract ◽  
Supplementary Motor Area ◽  
Personal Responsibility ◽  
Motor Area ◽  
Simple Motor ◽  
Motor Actions ◽  
Intense Debate

Abstract Background Research suggests that unconscious activity in the supplementary motor area (SMA) precedes not only certain simple motor actions but also the point at which we become aware of our intention to perform such actions. The extent to which these findings have implications for our understanding of the concepts of free will and personal responsibility has been subject of intense debate during the latest four decades. Methods This research is discussed in relation to effects of neurosurgical removal of the SMA in a narrative review. Results Removal of the SMA typically causes a transient inability to perform non-stimulus-driven, voluntary actions. This condition, known as the SMA syndrome, does not appear to be associated with a loss of sense of volition but with a profound disruption of executive function/cognitive control. Conclusions The role of the SMA may be to serve as a gateway between the corticospinal tract and systems for executive function. Such systems are typically seen as tools for conscious decisions. What is known about effects of SMA resections would thus seem to suggest a view that is compatible with concepts of personal responsibility. However, the philosophical question whether free will exists cannot be definitely resolved on the basis of these observations.

Acquisition of a Simple Motor Skill by Low and High Academic Achievers

1982 ◽  
Vol 54 (2) ◽  
pp. 377-378 ◽  
Author(s):  
Reno J. Ramella
Keyword(s):  
Motor Skill ◽  
High Achievers ◽  
Simple Motor

The purpose of this study was to ascertain if low and high academic achievers ( ns = 9) learned a simple stick-pulling task similarly. High achievers performed better early in practice but the advantage disappeared by the end of the 9 trials.

Dynamic Characterization of Brushless DC Motors and Propellers for Flight Applications

2017 ◽  
Vol 05 (03) ◽  
pp. 159-167 ◽  
Author(s):  
Dominic Muzar ◽  
Eric Lanteigne ◽  
Justin McLeod
Keyword(s):  
Simple Model ◽  
Brushless Dc Motor ◽  
Dynamic Characterization ◽  
Brushless Dc Motors ◽  
Brushless Dc ◽  
Dc Motors ◽  
Simple Motor ◽  
Aerial Vehicle ◽  
Selection Of

Although there exist a number of accurate unmanned aerial vehicle (UAV) thruster models, these models require the precise measurements of several motor and propeller characteristics. This paper presents a simple motor and propeller model that relies solely upon data provided by manufacturers. The model is validated by comparing theoretical motor and propeller behavior to experimental results obtained from thrust tests in a wind tunnel. The objective is to provide an accurate yet simple model to facilitate the selection of appropriate brushless DC motor and propeller combinations for flight applications.

Simple Motor System of the Ascidian Larva: Neuronal Complex Comprising Putative Cholinergic and GABAergic/Glycinergic Neurons

2010 ◽  
Vol 27 (2) ◽  
pp. 181-190 ◽  
Author(s):  
Takeo Horie ◽  
Masashi Nakagawa ◽  
Yasunori Sasakura ◽  
Takehiro G. Kusakabe ◽  
Motoyuki Tsuda
Keyword(s):  
Motor System ◽  
Simple Motor ◽  
Ascidian Larva
Sign in / Sign up

Export Citation Format

Share Document