Eating interrupted: the effect of intent on hand-to-mouth actions

Flindall, Jason W.; Gonzalez, Claudia L. R.

doi:10.1152/jn.00295.2014

Cited by 19 publications

(16 citation statements)

References 66 publications

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“…This task difference in hand pre-shaping is predominantly lateralized to the right hand, regardless of a person's overall hand preference (Flindall and Gonzalez, 2013 ; Flindall et al, 2014 ). Taken together, these findings all support a theory of human motor cortex organized around a catalog of movements based on end-goal, rather than mechanical requirements (Graziano et al, 2002 , 2004 , 2005 ; Fogassi et al, 2005 ; Graziano, 2006 , 2009 ; Bonini et al, 2011 , 2012 ; Flindall and Gonzalez, 2013 , 2014 ). The results from the present study demonstrating greater right-hand use for the grasp-to-eat task further support the proposal that this type of action might be at the forefront of population level right-handedness in humans.…”

Section: Discussionsupporting

confidence: 71%

“…This presumption is supported by findings from Sacrey et al ( 2013 ), who found that children develop a right-hand preference for grasp-to-eat tasks several years earlier than they do for grasp-to-build tasks. Furthermore, Flindall and Gonzalez (Flindall and Gonzalez, 2013 , 2014 , submitted; Flindall et al, 2014 ) have found a left-hemisphere/right-hand advantage in the kinematics of grasp-to-eat/hand-to-mouth actions that is absent from grasp-to-place actions. Specifically, when grasping a small food item with intent to eat, participants produce tighter maximum grip apertures during the outgoing movement than when grasping the same item to place it in a receptacle near the mouth.…”

Section: Discussionmentioning

confidence: 99%

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Hand preference across the lifespan: effects of end-goal, task nature, and object location

2015

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In the present study we investigate age-related changes in hand preference for grasping and the influence of task demands on such preference. Children (2–11), young-adults (17–28) and older-adults (57–90) were examined in a grasp-to-eat and a grasp-to-construct task. The end-goal of these tasks was different (eat vs. construct) as was the nature of the task (unimanual vs. bimanual). In both tasks, ipsilateral and contralateral grasps were analyzed. Results showed a right-hand preference that did not change with age. Across the three age groups, a more robust right-hand preference was observed for the unimanual, grasp-to-eat task. To disentangle if the nature (unimanual) or the end-goal (grasp-to-eat) was the driver of the robust right-hand preference, a follow up experiment was conducted. Young-adult participants completed a unimanual grasp-to-place task. This was contrasted with the unimanual grasp-to-eat task and the bimanual grasp-to-construct task. Rates of hand preference for the grasp-to-eat task remained the highest when compared to the other two grasping tasks. Together, the results demonstrate that hand preference remains stable from childhood to older adulthood, and they suggest that a left hemisphere specialization exists for grasping, particularly when bringing food to the mouth.

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Section: Discussionsupporting

confidence: 71%

Section: Discussionmentioning

confidence: 99%

Hand preference across the lifespan: effects of end-goal, task nature, and object location

2015

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“…Similar results have been described in 1-to 5-year-old children: right-hand preference for grasp-to-eat movement was present earlier (from 1 year of age) and was then stronger than hand preference for grasp-to-build movement (Sacrey et al, 2013). However, although mechanical requirements of the different types of grasp do seem identical, investigations of hand kinematics have shown smaller grip apertures during the pre-shaping phase of right-hand grasp-to-eat action, compared to other grasping movements (Flindall and Gonzalez, 2014). Smaller grip apertures are typically associated with greater precision, in relation with increased need for visual and somatosensory guidance of the hand, which might explain the greater right-hand bias for reachto-eat behavior.…”

Section: Grasping and Manipulating Objectsmentioning

confidence: 96%

Manual asymmetries and hemispheric specialization: Insight from developmental studies

Cochet

2016

Neuropsychologia

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The objective of this review is to obtain a better understanding of the relationship between manual asymmetries and hemispheric specialization by focusing on the development of hand preference and cerebral lateralization of language. We first sought to describe the development of manual asymmetries for different activities (i.e., grasping and manipulating objects vs. communicating through gestures), and the development of cerebral asymmetries, before examining available data on the association between hand preference and HS for language. We also analyzed behavioral studies on the relation between hand preference and language development, as well as more specific studies on the relation between the cerebral control of gestures and language. Finally, we aimed at providing a wider view on functional asymmetries by emphasizing the need to study hemispheric specialization for functions other than language, and in particular for visual attention.

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“…Our finding that hand preference for the grasp-to-eat action is a reliable predictor of the proficiency of speech articulation provides support for the speculation that the hand to mouth action, which developed for ingestion, may also subserve vocal communication (Gentilucci et al, 2009; Flindall and Gonzalez, 2013). Moreover, the grasp-to-eat action has been shown to be lateralized to the left hemisphere (Flindall and Gonzalez, 2013, 2014; Flindall et al, 2014). Specifically they have shown a right hand advantage in the kinematics of grasp-to-eat/hand-to-mouth actions that is absent from grasp-to-place actions.…”

Section: Discussionmentioning

confidence: 99%

Speech in action: degree of hand preference for grasping predicts speech articulation competence in children

Gonzalez¹,

Li²,

Mills³

et al. 2014

Front. Psychol.

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Highlights: Degree of lateralization for grasping predicts the maturity of the language production system in young, typically-developing children.In this report we provide compelling evidence for the relationship between right hand grasp-to-mouth (i.e., feeding) movements and language development. Specifically, we show that children (4–5 years old) who are more right-hand lateralized in picking up small food items for consumption show enhanced differentiation of the “s” and “sh” sounds. This result suggests that left hemisphere control of hand-to-mouth gestures may have provided an evolutionary platform for the development of language. The current investigation presents the exciting possibility that early right hand-to-mouth training could accelerate the development of articulation skills.

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Eating interrupted: the effect of intent on hand-to-mouth actions

Abstract: Flindall JW, Gonzalez CL. Eating interrupted: the effect of intent on hand-to-mouth actions.

Cited by 19 publications

References 66 publications

Hand preference across the lifespan: effects of end-goal, task nature, and object location

Hand preference across the lifespan: effects of end-goal, task nature, and object location

Manual asymmetries and hemispheric specialization: Insight from developmental studies

Speech in action: degree of hand preference for grasping predicts speech articulation competence in children

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