title: [Parietal Cortices and Body Information].
abstract: Proprioceptive signals originating from skeletal muscles and joints contribute to the formation of both the human body schema and the body image. In this chapter, we introduce various types of bodily illusions that are elicited by proprioceptive inputs, and we discuss distinct functions implemented by different parietal cortices. First, we illustrate the primary importance of the motor network in the processing of proprioceptive (kinesthetic) signals originating from muscle spindles. Next, we argue that the right inferior parietal cortex, in concert with the inferior frontal cortex (both regions connected by the inferior branch of the superior longitudinal fasciculus-SLF III), may be involved in the conscious experience of body image. Further, we hypothesize other functions of distinct parietal regions: the association between internal hand motor representation with external object representation in the left inferior parietal cortex, visuo-kinesthetic processing in the bilateral posterior parietal cortices, and the integration of somatic signals from different body parts in the higher-order somatosensory parietal cortices. Our results indicate that a distinct parietal region, in concert with its anatomically and functionally connected frontal regions, probably plays specialized roles in the processing of body-related information.
authors.affiliation: Center for Information and Neural Networks, National Institute of Information and Communications Technology.
authors.forename: Eiichi
authors.initials: E
authors.lastname: Naito
authors.forename: Kaoru
authors.initials: K
authors.lastname: Amemiya
authors.forename: Tomoyo
authors.initials: T
authors.lastname: Morita
mesh_terms: D000818:Animals; D001931:Brain Mapping / Q000379:methods; D005625:Frontal Lobe / Q000502:physiology*; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D009415:Nerve Net / Q000502:physiology*; D010296:Parietal Lobe / Q000502:physiology*; D013003:Somatosensory Cortex / Q000502:physiology*