Orb weavers: Patterns in the movement sequences of spider web construction

2021 ◽  
Vol 31 (22) ◽  
pp. R1467-R1469
Author(s):  
Julie H. Simpson ◽  
Benjamin L. de Bivort
Keyword(s):  
Spider Web ◽  
Movement Sequences ◽  
Web Construction

Rehearsal and Learning of Embedded Movement Sequences during a Tracking Task

1982 ◽  
Vol 55 (2) ◽  
pp. 615-622 ◽  
Author(s):  
Ian M. Franks
Keyword(s):  
Time Lag ◽  
Specific Pattern ◽  
Tracking Task ◽  
Stimulus Sequence ◽  
Tracking Performance ◽  
Second Phase ◽  
Movement Sequences ◽  
Perceptual Changes

The first phase of the experiment was undertaken to examine the response changes that occur when a subject learns to track a repeating sequence that is embedded in a stimulus signal. The subject's tracking performance as measured by consistency and time-lag indices improved despite having no reportable knowledge of the repeating segment of the stimulus signal. The second phase investigated the perceptual changes that accompany the learning of the tracking task. It appeared that a subject's perception of the speed of a stimulus sequence while tracking varied depended upon the familiarity of the specific pattern of movements that comprised the signal.

Short article: Effects of interlimb practice on coding and learning of movement sequences

2009 ◽  
Vol 62 (7) ◽  
pp. 1265-1276 ◽  
Author(s):  
Stefan Panzer ◽  
Thomas Muehlbauer ◽  
Melanie Krueger ◽  
Dirk Buesch ◽  
Falk Naundorf ◽  
...  
Keyword(s):  
Dominant Role ◽  
Short Article ◽  
Independent Manner ◽  
Contralateral Limb ◽  
Activation Patterns ◽  
Movement Sequences ◽  
Visual Spatial ◽  
Spatial Coordinates ◽  
Element Movement ◽  
Complex Movement

An interlimb practice paradigm was designed to determine the role that visual–spatial (Cartesian) and motor (joint angles, activation patterns) coordinates play in the coding and learning of complex movement sequences. Participants practised a 16-element movement sequence by moving a lever to sequentially presented targets with one limb on Day 1 and the contralateral limb on Day 2. Practice involved the same sequence with either the same visual–spatial or motor coordinates on the two days. A unilateral practice condition (control) was also tested where both coordinate systems were changed but the same limb was used. Retention tests were conducted on Day 3. Regardless of the order in which the limbs were used during practice, results indicated that keeping the visual–spatial coordinates the same during acquisition resulted in superior retention. This provides strong evidence that the visual–spatial code plays a dominant role in complex movement sequences, and this code is represented in an effector-independent manner.

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