Body feeling sphere
Sphere of body feeling is a term that is often used synonymously with “ somatosensory cortex ” in brain research . However, it is mostly applied to the coordination and processing of sensory stimuli in the neighboring association centers (“sensitive bark fields”). Here, not only haptic sensory modalities, such as in the somatosensory cortex, are important, but rather the sphere of body feeling as a neurophysiologically and neuropsychologically circumscribed term also relates to conscious perception and the experience of other sensory stimuli, in particular optical sensations . In addition to the primary cortical centers, the secondary and tertiary sensory brain centers of the cortex play a role, see the explanation of these terms based on the theory of perception and especially vision . In psychiatry , the sphere of body feeling also represents the anatomical basis of various coenesthesias .
Brain structures involved
- The postcentral gyrus as the primary somatotopically structured sensory center of the somatosensory cortex, a so-called projection center , enables the perception of haptic stimuli localized on the body diagram. The sensory homunculus is formed at the postcentral gyrus .
- Lobulus parietalis superior as a field of association
- Lobulus paracentralis as a further field of association
Areas 1–3 and 5 are specified as Brodmann areas .
Optical agnosias
Broser described an optical agnosia that relates to the recognition of spatially assembled objects and, as a result, leads to apractical disorders when assembling such objects. Likewise, the spatial perception is disturbed, especially when it comes to symbolic spatial imagination, such as handling maps, and distances cannot be estimated. He called this disorder geometric-optical or spatial-optical agnosia. The occipital lobe alone could not be responsible for this, but only damage to the sphere of body feeling.
Coenesthesia
A connection between coenesthesia and the sphere of body feeling is described, which also includes the development of the body scheme. The body feeling sphere is also referred to as the “psychaesthetic center”. The concept of psychaesthetics was coined by Wilhelm Salber .
Individual evidence
- ↑ a b c Sphere of body feeling . In: Norbert Boss (Ed.): Roche Lexicon Medicine . 2nd Edition. Hoffmann-La Roche AG and Urban & Schwarzenberg, Munich 1987, ISBN 3-541-13191-8 , p. 962, Gesundheit.de/roche
- ^ Fritz Broser: Topical and clinical diagnosis of neurological diseases . 2nd Edition. U&S, Munich 1981, ISBN 3-541-06572-9 , chapters 10-31, p. 454