Summary clinical neuropsychology: body respresentation

Clinical neuropsychology: sensorimotor integration&
body representation
INTRODUCTION
MULTISENSORY AND SENSORIMOTOR INTEGRATION

* in vershillende vlakken positie in de ruimte bepalen




 Example
- Info sens systemen
 Vergeleken input & verwerkt
 Bepalen positie ledematen in ruimte
 Bewegingen worden gekozen
 Bewegen in adaptieve manier




 It starts in visual space and after processing al the information you are able to close your eyes and still
know your surroundings.

 Efferent’s copy:
- copy of motor plan send to your body to be able to move and a copy to the SMC to know afterwards if
the movement was right (feedback loop). You compare the copy with the feedback to know if the
movement was how you wanted it to be. After that you can adjust your movement
- Copy van beweging dat we willen doen dat wordt gestuurd naar somatosen motorCortex helpen
aanpassen beweging
 Door FB loop gemapt op copy die werd gestuurd
 FB loop opnieuw na uitvoeren beweging
 Indien nodig beweging aanpassen
 Alles is berekend en samengevoegd in systeem

- Multisensory integration implies a series of coordinate transformations
of the sensory input into a non-retinal, body-centered frame of
reference.
- Calculation of a body-centered reference frame based on multisensory information and sensorimotor
integration
  Constantly adjusted perception of body position in space, targeting adequate spatial behavior /
individual-environment interaction




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, Clinical neuropsychology: sensorimotor integration&
body representation
BODY REPRESENTATION

 = the cerebral construction and updates that allow self-conscious being and interacting in the environment
 a two-unit with the cerebral representation of the peripersonal space (PPS)
- Peripersonal= ruimte die lichaam omgeeft
 Omgeving zover je kan reiken
- Personen reageren sneller wanneer iets gebeurt in peripersonal space

 Differentiated and described by different authors in different constructs:
- body image, body scheme, body model, semantic body knowledge, structural body description, ...
 Body scheme en PPS is vrij gelijkaardig bij vergelijken




 Unity of body-PPS representation:
- multisensory-motor interface
- ego-centered, trunk-based
- enables body-object/person interactions
- reference frame allowing individual to function in space

EMBODIMENT/EMBODIED COGNITION

 Concept in the cognitive sciences which emphasizes the importance of:
- Welke problemen wanneer lichaamsdeel niet meer embodied is??
- Hoe aanpassen aan omgeving?
- sensorimotor skills, for general intelligence and cognition, and for the subjective experience of body
ownership
- the role of the body in shaping our mental processes
- the physical self-awareness in your own body (self-identification) at a specific location in space
- Identificeren uzelf in bepaald moment in de ruimte

CEREBRAL SUBSTRATE

 Multisensory integration in network of neurons with spatially congruent receptive fields for different
sensory modalities, for instance cells in macaque research:
- visuovestibular en visuotactile in the VIP area
 VIP= ventral interpariental area
- visuo-auditory in the parietal reach region
- visuotactile in the prefrontal cortex
- visuo-audio-tactile in premotor & post. parietal areas
- spatially congruent receptive fields: reaction in the same space as they get the information???
- Meer frontaal
- Neuronen die enkel reageren op maar 1 soort sensory info (vb auditory&vis)
 Wanneer deze gelokaliseerd worden in zelfde locatie in de ruimte= reageren
 Vb: iets zien en horen p zelfde plek in ruimte= neuro reageren
 Sensorimotor integration in (posterior)parieto- (pre)motor network: PPS-interface combining multisensory
information and action planning
- TPJ= temporal parietal junction
- anG= anular gysrus




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