Fncts forward models are central to motor control

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Unformatted text preview: 02): 3 levels • Body image: lexical-semantic knowledge of the body and its functions • Body structure description: knowledge of spatial relationships • Body schema: dynamic online-representation of the body in space from somatosensory afferences; • Plus: intention & motor components? 53 Body schema: necessary 4 sensorim. fncts. • Forward models are central to motor control. Intention, desired sensory change Feedback Motor command ce eren Eff opy c Forward model Predicted movement Viking lander 3 Motor plant Movement of effector Feedback Teaching signal Inverse model Body schema: necessary 4 sensorim. fncts. Hermosillo et al. (2011) Body schema: necessary 4 sensorim. fncts. • Tactile temporal order judgments are more difficult with crossed hands. • TOJ are also more difficult when the future hand posture will be crossed. • Evidence for a forward model of motor control incorporating future posture. were observed. This expression might represent a genetic indicator of faculties of the intact and brain-damaged human brain. Body schema: necessary 4 sensorim. fncts. five minutes of food retrieval with the handheld rake (Figure 1c). Bimodal neurons with the above properties were named ‘distal type’ neurons. Other bimodal neurons with sRFs located around shoulder/neck (named ‘proximal type’, Figure 1e) had vRFs covering the space reached by the arm (Figure 1f). After tool-use, these proximal vRFs expanded to code the space now accessible with (Figure 1g). Such vRF expansions may constitute th substrate of use-dependent assimilation of the the body schema, suggested by classical neurolo also Box 2). Hence, any expansion of the vRF onl Visuo-somatosensory cells for dexterous tool-use in macaque. Distal-type neurons • Visual RFs (pink) of neurons in intraparietal cortex change with tool-use. • sRF = somatosensory RF (blue) (a) (b) (c) (d) sRF Before tool-use After tool-use Passive holding Proximal-type neurons (e) (f) (g) sRF Before tool-use After tool-use Body schema: Out of body Impaired integration of somatosensory & vestibular somatoinformation? sensory OBE, • ‘Out-of-body’ experiences body part (OBEs): sensations in which illusions, vestibular consciousness becomes detached from the body, taking up a remote viewing position • Near-death, across cultures • Right angular gyrus • Vestibular: sinking into the bed, falling motor auditory seizure focus Blanke et al. (2002) • “I see myself lying in bed, from above, but I only see my legs and lower trun...
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This note was uploaded on 04/11/2012 for the course NEURO NROC64 taught by Professor Matthias during the Winter '12 term at University of Toronto- Toronto.

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