Matches in SemOpenAlex for { <https://semopenalex.org/work/W832004343> ?p ?o ?g. }
Showing items 1 to 87 of
87
with 100 items per page.
- W832004343 abstract "In many movements of the upper limb such as reaching, positioning, and displacing the objects, the hand moves smoothly along a uni-directional planar trajectory with a bell-shaped speed profile. Because of variability of the load, gravitational and velocity interaction forces between its segments, the dynamics of the arm during the motion is very complex. Motion of the upper arm and the forearm are coordinated to produce smooth movements despite such complex dynamics. This coordination constitutes an important organizational feature of arm movement. The present paper describes some experimental results related to the above and interprets their role in producing smooth motion of the hand. Trajectories of the right upper limb in vertical plane and the simultaneous muscles' EMG activities were recorded for extensions of various amplitudes under four loads. The forearm trajectories are smooth with bell-shaped speed profiles. The upper arm trajectories may have bimodal speed profiles and three segments, resembling an inverted 'Z.' Segmentation is sharper for the points near the shoulder joint, and is accentuated by load. As one moves from the central points near the shoulder joint to the peripheral points near the hand, the three segments merge and result in smooth curves with single-peaked speed profiles. The three segments have a coherent time course and can be identified rather accurately and non-ambiguously. The observed trajectories and the EMG patterns reveal an effective coordination strategy which utilizes the structure and the dynamics of the moving arm to produce smooth movement." @default.
- W832004343 created "2016-06-24" @default.
- W832004343 creator A5026913720 @default.
- W832004343 date "1991-06-01" @default.
- W832004343 modified "2023-09-23" @default.
- W832004343 title "Coordination of human upper arm and forearm motion in rapid extensions" @default.
- W832004343 hasPublicationYear "1991" @default.
- W832004343 type Work @default.
- W832004343 sameAs 832004343 @default.
- W832004343 citedByCount "0" @default.
- W832004343 crossrefType "journal-article" @default.
- W832004343 hasAuthorship W832004343A5026913720 @default.
- W832004343 hasConcept C104114177 @default.
- W832004343 hasConcept C105702510 @default.
- W832004343 hasConcept C121332964 @default.
- W832004343 hasConcept C121684516 @default.
- W832004343 hasConcept C127313418 @default.
- W832004343 hasConcept C1276947 @default.
- W832004343 hasConcept C134786449 @default.
- W832004343 hasConcept C13662910 @default.
- W832004343 hasConcept C154945302 @default.
- W832004343 hasConcept C197129107 @default.
- W832004343 hasConcept C23123220 @default.
- W832004343 hasConcept C24890656 @default.
- W832004343 hasConcept C2524010 @default.
- W832004343 hasConcept C2776660947 @default.
- W832004343 hasConcept C2780214079 @default.
- W832004343 hasConcept C2780226923 @default.
- W832004343 hasConcept C2988484212 @default.
- W832004343 hasConcept C33923547 @default.
- W832004343 hasConcept C37222873 @default.
- W832004343 hasConcept C39920418 @default.
- W832004343 hasConcept C41008148 @default.
- W832004343 hasConcept C71924100 @default.
- W832004343 hasConcept C74650414 @default.
- W832004343 hasConcept C89600930 @default.
- W832004343 hasConceptScore W832004343C104114177 @default.
- W832004343 hasConceptScore W832004343C105702510 @default.
- W832004343 hasConceptScore W832004343C121332964 @default.
- W832004343 hasConceptScore W832004343C121684516 @default.
- W832004343 hasConceptScore W832004343C127313418 @default.
- W832004343 hasConceptScore W832004343C1276947 @default.
- W832004343 hasConceptScore W832004343C134786449 @default.
- W832004343 hasConceptScore W832004343C13662910 @default.
- W832004343 hasConceptScore W832004343C154945302 @default.
- W832004343 hasConceptScore W832004343C197129107 @default.
- W832004343 hasConceptScore W832004343C23123220 @default.
- W832004343 hasConceptScore W832004343C24890656 @default.
- W832004343 hasConceptScore W832004343C2524010 @default.
- W832004343 hasConceptScore W832004343C2776660947 @default.
- W832004343 hasConceptScore W832004343C2780214079 @default.
- W832004343 hasConceptScore W832004343C2780226923 @default.
- W832004343 hasConceptScore W832004343C2988484212 @default.
- W832004343 hasConceptScore W832004343C33923547 @default.
- W832004343 hasConceptScore W832004343C37222873 @default.
- W832004343 hasConceptScore W832004343C39920418 @default.
- W832004343 hasConceptScore W832004343C41008148 @default.
- W832004343 hasConceptScore W832004343C71924100 @default.
- W832004343 hasConceptScore W832004343C74650414 @default.
- W832004343 hasConceptScore W832004343C89600930 @default.
- W832004343 hasLocation W8320043431 @default.
- W832004343 hasOpenAccess W832004343 @default.
- W832004343 hasPrimaryLocation W8320043431 @default.
- W832004343 hasRelatedWork W1533380159 @default.
- W832004343 hasRelatedWork W1808788800 @default.
- W832004343 hasRelatedWork W1965098788 @default.
- W832004343 hasRelatedWork W1978953167 @default.
- W832004343 hasRelatedWork W1984592173 @default.
- W832004343 hasRelatedWork W1985467962 @default.
- W832004343 hasRelatedWork W1986892260 @default.
- W832004343 hasRelatedWork W1992683873 @default.
- W832004343 hasRelatedWork W2007258447 @default.
- W832004343 hasRelatedWork W2025214697 @default.
- W832004343 hasRelatedWork W2027162611 @default.
- W832004343 hasRelatedWork W2102153709 @default.
- W832004343 hasRelatedWork W2108139794 @default.
- W832004343 hasRelatedWork W2137040421 @default.
- W832004343 hasRelatedWork W2144157565 @default.
- W832004343 hasRelatedWork W2163380268 @default.
- W832004343 hasRelatedWork W2172314155 @default.
- W832004343 hasRelatedWork W2186264918 @default.
- W832004343 hasRelatedWork W2218000087 @default.
- W832004343 hasRelatedWork W2595187054 @default.
- W832004343 isParatext "false" @default.
- W832004343 isRetracted "false" @default.
- W832004343 magId "832004343" @default.
- W832004343 workType "article" @default.