Bodily Feelings Emerge in the Insular Cortex

2014 ◽  
Author(s):  
A. D. (Bud) Craig
Keyword(s):  
Insular Cortex ◽  
The Body ◽  
Facial Feedback ◽  
Anterior Insular Cortex ◽  
Bodily Feelings ◽  
Posterior Insula ◽  
Facial Feedback Hypothesis ◽  
As If

This chapter presents evidence that supports the idea that activity in the interoceptive cortex in the posterior insula is re-represented, integrated, and transformed in the middle and anterior portions of human insular cortex to generate the feelings that one experiences. It also explains how vivid feelings are generated in a model of interoceptive integration that engenders homeostatic sentience. The emergence of bodily feelings provides the foundation for the generation of emotional feelings in the anterior insular cortex as if they are feelings from the body. The chapter then describes the evidence for the embodiment of emotional feelings, including the recent use of Botox to elucidate central mechanisms for the facial feedback hypothesis.

scholarly journals Anterior insular cortex plays a critical role in interoceptive attention

2018 ◽  
Author(s):  
Xingchao Wang ◽  
Qiong Wu ◽  
Laura Egan ◽  
Xiaosi Gu ◽  
Pinan Liu ◽  
...  
Keyword(s):  
Critical Role ◽  
Insular Cortex ◽  
The Body ◽  
Physiological Signals ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Discrimination Accuracy ◽  
Anterior Insular Cortex ◽  
Interoceptive Accuracy ◽  
Healthy Participants

AbstractAlthough accumulating evidence indicates that the anterior insular cortex (AIC) mediates interoceptive attention, which refers the attention towards physiological signals arising from the body, the necessity of the AIC in this process has not been demonstrated. Using a novel task that directs attention toward breathing rhythm, we assessed the involvement of the AIC in interoceptive attention in healthy participants using functional magnetic resonance imaging and examined the necessity of the AIC in interoceptive attention in patients with AIC lesions. We found that interoceptive attention was associated with greater AIC activation, as well as enhanced coupling between the AIC and somatosensory area along with reduced coupling between AIC and visual sensory areas. AIC activation and connectivity were predictive of individual differences in interoceptive accuracy. Importantly, AIC lesion patients showed disrupted interoceptive discrimination accuracy and sensitivity. Together, these results provide compelling evidence that AIC plays a critical role in interoceptive attention.

scholarly journals Anterior insular cortex plays a critical role in interoceptive attention

eLife ◽  
2019 ◽  
Vol 8 ◽  
Author(s):  
Xingchao Wang ◽  
Qiong Wu ◽  
Laura Egan ◽  
Xiaosi Gu ◽  
Pinan Liu ◽  
...  
Keyword(s):  
Critical Role ◽  
Insular Cortex ◽  
The Body ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Discrimination Accuracy ◽  
Anterior Insular Cortex ◽  
Interoceptive Accuracy ◽  
Healthy Participants ◽  
Somatosensory Areas

Accumulating evidence indicates that the anterior insular cortex (AIC) mediates interoceptive attention which refers to attention towards physiological signals arising from the body. However, the necessity of the AIC in this process has not been demonstrated. Using a novel task that directs attention toward breathing rhythm, we assessed the involvement of the AIC in interoceptive attention in healthy participants using functional magnetic resonance imaging and examined the necessity of the AIC in interoceptive attention in patients with AIC lesions. Results showed that interoceptive attention was associated with increased AIC activation, as well as enhanced coupling between the AIC and somatosensory areas along with reduced coupling between the AIC and visual sensory areas. In addition, AIC activation was predictive of individual differences in interoceptive accuracy. Importantly, AIC lesion patients showed disrupted interoceptive discrimination accuracy and sensitivity. These results provide compelling evidence that the AIC plays a critical role in interoceptive attention.

scholarly journals Multiple Somatotopic Representations of Heat and Mechanical Pain in the Operculo-Insular Cortex: A High-Resolution fMRI Study

2010 ◽  
Vol 104 (5) ◽  
pp. 2863-2872 ◽  
Author(s):  
Ulf Baumgärtner ◽  
Gian Domenico Iannetti ◽  
Laura Zambreanu ◽  
Peter Stoeter ◽  
Rolf-Detlef Treede ◽  
...  
Keyword(s):  
High Resolution ◽  
Integration Site ◽  
Insular Cortex ◽  
The Body ◽  
Noxious Heat ◽  
Fmri Study ◽  
Posterior Insula ◽  
The Right ◽  
And Behavior ◽  
Stimulation Of

Whereas studies of somatotopic representation of touch have been useful to distinguish multiple somatosensory areas within primary (SI) and secondary (SII) somatosensory cortex regions, no such analysis exists for the representation of pain across nociceptive modalities. Here we investigated somatotopy in the operculo-insular cortex with noxious heat and pinprick stimuli in 11 healthy subjects using high-resolution (2 × 2 × 4 mm) 3T functional magnetic resonance imaging (fMRI). Heat stimuli (delivered using a laser) and pinprick stimuli (delivered using a punctate probe) were directed to the dorsum of the right hand and foot in a balanced design. Locations of the peak fMRI responses were compared between stimulation sites (hand vs. foot) and modalities (heat vs. pinprick) within four bilateral regions of interest: anterior and posterior insula and frontal and parietal operculum. Importantly, all analyses were performed on individual, non-normalized fMRI images. For heat stimuli, we found hand-foot somatotopy in the contralateral anterior and posterior insula [hand, 9 ± 10 (SD) mm anterior to foot, P < 0.05] and in the contralateral parietal operculum (SII; hand, 7 ±10 mm lateral to foot, P < 0.05). For pinprick stimuli, we also found somatotopy in the contralateral posterior insula (hand, 9 ±10 mm anterior to foot, P < 0.05). Furthermore, the response to heat stimulation of the hand was 11 ± 12 mm anterior to the response to pinprick stimulation of the hand in the contralateral (left) anterior insula ( P < 0.05). These results indicate the existence of multiple somatotopic representations for pain within the operculo-insular region in humans, possibly reflecting its importance as a sensory-integration site that directs emotional responses and behavior appropriately depending on the body site being injured.

A Meta-Analysis of the Facial Feedback Literature: Effects of Facial Feedback on Emotional Experience Are Small and Variable

2017 ◽  
Author(s):  
Nicholas Alvaro Coles ◽  
Jeff T. Larsen ◽  
Heather Lench
Keyword(s):  
Publication Bias ◽  
Emotional Experience ◽  
Meta Analysis ◽  
Effect Sizes ◽  
Detection Methods ◽  
Feedback Effects ◽  
Facial Feedback ◽  
Facial Movements ◽  
Facial Feedback Hypothesis ◽  
Variance Estimates

The facial feedback hypothesis suggests that an individual’s experience of emotion is influenced by feedback from their facial movements. To evaluate the cumulative evidence for this hypothesis, we conducted a meta-analysis on 286 effect sizes derived from 138 studies that manipulated facial feedback and collected emotion self-reports. Using random effects meta-regression with robust variance estimates, we found that the overall effect of facial feedback was significant, but small. Results also indicated that feedback effects are stronger in some circumstances than others. We examined 12 potential moderators, and three were associated with differences in effect sizes. 1. Type of emotional outcome: Facial feedback influenced emotional experience (e.g., reported amusement) and, to a greater degree, affective judgments of a stimulus (e.g., the objective funniness of a cartoon). Three publication bias detection methods did not reveal evidence of publication bias in studies examining the effects of facial feedback on emotional experience, but all three methods revealed evidence of publication bias in studies examining affective judgments. 2. Presence of emotional stimuli: Facial feedback effects on emotional experience were larger in the absence of emotionally evocative stimuli (e.g., cartoons). 3. Type of stimuli: When participants were presented with emotionally evocative stimuli, facial feedback effects were larger in the presence of some types of stimuli (e.g., emotional sentences) than others (e.g., pictures). The available evidence supports the facial feedback hypothesis’ central claim that facial feedback influences emotional experience, although these effects tend to be small and heterogeneous.

scholarly journals The Anterior Insular Cortex→Central Amygdala Glutamatergic Pathway Is Critical to Relapse after Contingency Management

Neuron ◽  
2017 ◽  
Vol 96 (2) ◽  
pp. 414-427.e8 ◽  
Author(s):  
Marco Venniro ◽  
Daniele Caprioli ◽  
Michelle Zhang ◽  
Leslie R. Whitaker ◽  
Shiliang Zhang ◽  
...  
Keyword(s):  
Contingency Management ◽  
Insular Cortex ◽  
Central Amygdala ◽  
Anterior Insular Cortex

THE INSULA: ISLAND OF REIL

2015 ◽  
Vol 86 (11) ◽  
pp. e4.155-e4
Author(s):  
Ray Wynford-Thomas ◽  
Rob Powell
Keyword(s):  
Speech Processing ◽  
Brain Function ◽  
Insular Cortex ◽  
Normal Brain ◽  
Temporal Epilepsy ◽  
Normal Brain Function ◽  
Temporal Structures ◽  
Hypermotor Seizures ◽  
Posterior Insula ◽  
As Effects

Just as ‘no man is an island’, despite its misleading name, the insula is not an island. Sitting deeply within the cerebrum, the insular cortex and its connections play an important role in both normal brain function and seizure generation. Stimulating specific areas of the insula can produce somatosensory, viscerosensory, somatomotor and visceroautonomic symptoms, as well as effects on speech processing and pain. Insular onset seizures are rare, but may mimic both temporal and extra-temporal epilepsy and if not recognised, may lead to failure of epilepsy surgery. We therefore highlight the semiology of insular epilepsy by discussing three cases with different auras. Insular onset seizures can broadly be divided into three main types both anatomically and according to seizure semiology:1. Seizures originating in the antero-inferior insula present with laryngeal constriction, along with visceral and gustatory auras (similar to those originating in medial temporal structures).2. Antero-superior onset seizures can have a silent onset, but tend to propagate rapidly to motor areas causing focal motor or hypermotor seizures.3. Seizures originating in the posterior insula present with contralateral sensory symptoms.

The Shroud of Turin

1997 ◽  
Vol 9 (1) ◽  
pp. 121-140
Author(s):  
Thaddeus J. Trenn ◽  
Keyword(s):  
Body Image ◽  
Scientific Evidence ◽  
The Body ◽  
Religious Art ◽  
Satisfactory Explanation ◽  
Marshall Mcluhan ◽  
Modern Age ◽  
Shroud Of Turin ◽  
High Degree ◽  
As If

The Shroud of Turin, a linen cloth with but a faint image, continues to capture the interest of many people of diverse beliefs. Although the measured age of the cloth is relatively recent, other scientific findings indicate an earlier provenance. Any firm conclusions regarding the cloth's history remain premature. No satisfactory explanation has been found as yet for how the image on the cloth was produced structurally or stylistically. Iconographic evidence suggests that the image was the source of facial peculiarities found in early works of religious art. The body image bears a striking yet preternatural correlation with Scriptural accounts of wounds. Curiously, the image on the cloth functions as a photographic negative, exhibiting a high degree of resolution, as if the original were produced in pixels. Despite serious efforts to discover some artistic origin md medium, scientific evidence points in the direction that it was not produced by hands. If it is tme that the medium is the message, as Marshall McLuhan wrote, then the Turin Shroud may be a parable for the modern age.

XXIV. Observations on the Chariots of the antient Britains. By the Rev. Mr. Pegge. In a Letter to the Rev. Mr. Norris

Archaeologia ◽  
1785 ◽  
Vol 7 ◽  
pp. 211-213
Author(s):  
Pegge
Keyword(s):  
The Body ◽  
Common Mistake ◽  
Proper Name ◽  
The Common ◽  
As If

Besides the common mistake of the annalists and historians in regard to this passage in Juvenal,Regem aliquem capies, aut de temone BritannoExcidet Arviragus—Juvenal IV. 126.By taking Arviragus for the proper name of a person, and not of an officer; the words of the satyrist are memorable in another respect, as serving to inform us, by the word temone, of a singular mode of fighting amongst the Britons; as if by leaving his carriage, and running upon the pole, the combatant from thence, or from the yoke, engaged the enemy, as long as he thought prudent and convenient, and then retreated back into the body of the vehicle.

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