Performance of fine motor coordination activities with an hypnotically anesthetized limb

Wallace, Benjamin; Hoyenga, Katharine Blick

doi:10.1080/00207148108409143

Cited by 9 publications

(8 citation statements)

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“…Immediately after the induction they were administered a S-min. suggestion for anesthesia of their dominant arm taken verbatim from Wallace and Hoyenga (1981). Low susceptible subjects were explicitly instructed to fake hypnosis and were then given the same induction procedure used for the highly susceptible subjects.…”

Section: Methodsmentioning

confidence: 99%

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Hypnotically induced limb anesthesia and adaptation to displacing prisms: A failure to confirm.

Spaños¹,

Gorassini²,

Petrusic³

1981

Journal of Abnormal Psychology

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Three groups of subjects were tested for accuracy of pointing at a visual target before and after wearing displacing prisms. One group consisted of 10 highly susceptible subjects given a hypnotic suggestion for limb anesthesia following the pretest, and a second group included 10 low susceptible subjects instructed to fake limb anesthesia. A control group (n = 10) unselected on susceptibility received no special instructions. The high susceptibles reported significantly greater felt anesthesia than subjects in the other two treatments (p < .05). Nevertheless, subjects in all three groups showed very large displacement errors (i.e., errors in pointing) following prism removal. Our results failed to confirm previous reports that placement errors were eliminated by hypnotic suggestion in highly susceptible subjects. Theoretical implications are discussed.

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Section: Methodsmentioning

confidence: 99%

“…Control subjects read magazines for the equivalent time period. Wallace and Hoyenga (1981) reported that latency to nose touch was increased during suggested limb anesthesia. Therefore, immediately following treatment administration, all of our subjects were asked to touch their nose three successive times while latencies to nose touch were recorded.…”

mentioning

confidence: 99%

Hypnotically induced limb anesthesia and adaptation to displacing prisms: A failure to confirm.

Spaños¹,

Gorassini²,

Petrusic³

1981

Journal of Abnormal Psychology

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“…These individuals were sufficiently informed for the task with respect to the consequences of induced, hypnotic anesthesia. They were told that the arm would feel totally numb and absent of all sensations (see Wallace & Hoyenga, 1981, for the exact instructions and procedure). If subjects scored low on the attribute of hypnotic susceptibility, they were requested to roleplay being hypnotized and having the limb feel hypnotically anesthetized.…”

Section: Methodsmentioning

confidence: 99%

“…The ability to perform this simple, proprioceptive task has been shown to be affected by the implementation of hypnotic anesthesia in the pointing limb. When this manipulation is in effect, the subject either misses the nose location or shows a prolonged response time between movement initiation and nose localization (Wallace & Hoyenga, 1981). Only hypnotically anesthetized subjects responded in error to the nose-touch task.…”

Section: Methodsmentioning

confidence: 99%

Prism adaptation with hypnotically induced limb anesthesia: The critical roles of head position and prism type

Wallace

Fisher

1984

Perception & Psychophysics

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“…Impaired performance at cerebellar tests during suggestions of anesthesia had suggested a cerebellar involvement in the motor response to sensory suggestions, but hypnotic relaxation may have influenced the performance (Wallace and Hoyenga, 1981). It has been also shown that overactivity in the cerebellum and in the parietal cortex is associated with the misattribution of actions to an external source (Blakemore et al, 2003), but this report did not consider a possible real, physiologically based involuntariness.…”

Section: Responses To Sensory Suggestions and The Cerebellummentioning

confidence: 99%

New views of hypnotizability

Santarcangelo

2014

Front. Behav. Neurosci.

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Hypnotizability is much more than a cognitive trait enabling people to feel and behave according to suggestions reporting involuntariness in action. In fact, we have shown several hypnotizability-related differences in sensorimotor integration in the participants’ ordinary state of consciousness and in the absence of specific suggestions.\ud This article deals with postural control during imagined sensory modulation in subjects with high and low hypnotizability. It reports evidence of automaticity in the imagery-triggered activation of neural circuits not controlled by expectancy and volition, and suggests that the perceived involuntariness in action associated with imagery of movements potentially controlled by volition/expectancy may be sustained by physiological mechanisms making it a real involuntariness. The described evidence suggests that part of the hypnotizability-related differences observed may depend on peculiar cerebellar activity/connectivity, proposes a possible role of the brain endothelial nitric oxide in hypnotic behavior, and, on the whole, brings the interpretation of hypnotic involuntariness beyond neo-dissociative and socio-cognitive perspectives

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Performance of fine motor coordination activities with an hypnotically anesthetized limb

Cited by 9 publications

References 10 publications

Hypnotically induced limb anesthesia and adaptation to displacing prisms: A failure to confirm.

Hypnotically induced limb anesthesia and adaptation to displacing prisms: A failure to confirm.

Prism adaptation with hypnotically induced limb anesthesia: The critical roles of head position and prism type

New views of hypnotizability

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