Understanding stable patterns of interpersonal movement coordination is essential to understanding successful social interaction and activity (i.e., joint action). Previous research investigating such has primarily focused on the synchronization simple rhythmic movements (e.g., finger/forearm oscillations or pendulum swinging). Very few studies, however, have explored that emerge during task-directed complementary tasks. Thus, aim current study was investigate model behavioral dynamics a...

We show that the human voice has complex acoustic qualities are directly coupled to peripheral musculoskeletal tensioning of body, such as subtle wrist movements. In this study, vocalizers produced a steady-state vocalization while rhythmically moving or arm at different tempos. Although listeners could only hear and not see vocalizer, they were able completely synchronize their own rhythmic movement with vocalizer which perceived in acoustics. This study corroborates recent evidence...

The phenomenon of gesture-speech synchrony involves tight coupling prosodic contrasts in gesture movement (e.g., peak velocity) and speech peaks fundamental frequency; F0). Gesture-speech has been understood as completely governed by sophisticated neural-cognitive mechanisms. However, may have its original basis the resonating forces that travel through body. In current preregistered study, movements with high physical impact affected phonation line observed natural contexts. Rhythmic...

The past several decades have been the setting for a remarkable evolution of spinal instrumentation technology. advancements that made allowed previously complex disorders cervical spine, atlantoaxial articulation, and occipitocervical junction to be managed more effectively with direct methods internal fixation arthrodesis. This has resulted in improvements patient outcomes fusion success rates. improved strength constructs allows minimal, if any, external bracing, obviating need halo...

ABSTRACT Motivated by previous research suggesting that informational and mechanical interlimb coupling can stabilize rhythmic movement patterns, the authors show stable 4-legged patterns between 2 individuals, either walking or running, emerge unintentionally from simple forms of coupling. Specifically, they leg movements pairs naive individuals become spontaneously phase locked when visually mechanically coupled via a foam appendage. Analysis each trials revealed distinct preferences for...

Expressive moments in communicative hand gestures often align with emphatic stress speech. It has recently been found that acoustic markers of arise naturally during steady-state phonation when upper-limb movements impart physical impulses on the body, most likely affecting acoustics via respiratory activity. In this confirmatory study, participants (N = 29) repeatedly uttered consonant-vowel (/pa/) mono-syllables while moving particular phase relations speech, or not upper limbs. This study...

Spatial perception by dynamic touch is a well-documented capability of the hand and arm. Morphological physiological characteristics foot leg suggest that such may not generalize to putatively less dexterous limb. The authors examined length in task which weighted aluminum rods were grasped wielded about wrist or secured ankle. Participants' (N = 10) upper lower extremities comparable terms (a) accuracy consistency (b) their sensitivity manipulations moments mass distribution rods. discuss...

Spasticity is a common impairment accompanying stroke. of the quadriceps femoris muscle can be quantified using pendulum test. The measurement properties pendular kinematics captured magnetic tracking system has not been studied among patients who have experienced Therefore, this study describes test-retest reliability and known groups convergent validity test measures obtained with Polhemus system. Eight chronic stroke underwent tests their affected unaffected lower limbs, without addition...

The high anterior cervical, retropharyngeal approach to the foramen magnum and upper cervical spine is a favorable alternative transoral posterolateral approaches, which both cause instability of craniovertebral junction. Previously, such was corrected via an occipitocervical fusion during separate surgical procedure.Seven patients requiring C-2 corpectomy (foramen meningioma [two patients], critical stenosis secondary rheumatoid arthritis fracture Rickets [one patient]) are presented. All...

The authors manipulated the circumstances in which individuals are typically embedded when standing upright by manipulating intensity of light and stationary structure environment. They expected that manipulations would affect 12 older participants (aged 65-82 years) more than it younger 22-24 years). Linear (e.g., total path length) nonlinear maximum line length recurrent points phase space) measures center pressure time series confirmed expectation. Moreover, for some measures, there was a...

In 1709, Berkeley hypothesized of the human that distance is measurable by ‘the motion his body, which perceivable touch’. To be sufficiently general and reliable, Berkeley's hypothesis must imply measured legged locomotion approximates actual distance, with measure invariant to gait, speed number steps. We studied blindfolded participants in a task they travelled from fixed starting point A variable terminus B, then reproduced, A–B distance. The outbound (‘measure’) return (‘report’) gait...

Abstract It is commonly understood that hand gesture and speech coordination in humans culturally cognitively acquired, rather than having a biological basis. Recently, however, the biomechanical physical coupling of arm movements to vocalization has been studied steady‐state monosyllabic utterances, where forces produced during gesturing are transferred onto tensioned body, leading changes respiratory‐related activity thereby affecting F0 intensity. In current experiment ( n = 37), we...

The information that people use to perceive whether a tool is suitable for certain task depends on what available at given time. Visually scanning and wielding it each provide about the functional attributes of tool. In experiment 1, we investigated relative contributions vision dynamic touch perceiving suitability various tools tasks. results show that, when both are available, visual dominates. When limited touch, ratings constrained by inertial properties tool, exploited depend task. 2,...

What does a student need to know be designer? Beyond list of separate skills, what mindset develop for designerly action now and into the future? In excitement cognitive revolution, Simon proposed way thinking about design that promised make it more manageable cognitive: think as planning problem [11, 29]. Yet, Suchman argued long ago [32], accounts may applied problems are not at base accomplished by planning, detriment vision. This paper reports on pedagogy takes Suchman's criticism heart...

ABSTRACT Upright standing is always environmentally embedded and typically co-occurs with another (suprapostural) activity. In the present study, authors investigate how these facts affect postural dynamics in an experiment which younger (M age = 20.23 years, SD 2.02 years) older 75.26 4.87 participants performed a task of detecting letters text or maintaining gaze within target while upright structured nonstructured stationary environment. They extracted coefficients drift (indexing...

At issue in the present series of experiments was ability to prospectively perceive action-relevant properties hand-held tools by means dynamic touch. In Experiment 1, participants judged object move-ability. 2, how difficult an would be hold if held horizontally, and Experiments 3 4, rated fast objects could rotated. each experiment, first second moments mass distribution were systematically varied. Manipulations wielding speed orientation during restricted exploration revealed perception...

Humans commonly engage in tasks that require or are made more efficient by coordinating with other humans. In this paper we introduce a task dynamics approach for modeling multi-agent interaction and decision making pick place where an agent must move object from one location to another decide whether act alone partner. Our aims were identify model (1) the affordance related define actor's choice pass it their co-actor (2) trajectory of hand movements when moving grasp, relocate, object....

Bipedal gaits have been classified on the basis of group symmetry minimal network identical differential equations (alias cells) required to model them. Primary are characterized by dihedral symmetry, whereas secondary a lower, cyclic symmetry. This fact was used in test human odometry. Results suggest that when distance is measured and reported from same class, primary comparable. Switching classes at report compresses (primary secondary) or inflates (secondary primary) distance, with...