Name: mpi cybermotion simulator: implementation of a novel motion simulator to investigate multisensory path integration in three dimensions
Uploaded: 2012-05-10T12:00:00
Duration: 9 min 46 s
Description: Watch this Scientific Journal Video about MPI CyberMotion Simulator: Implementation of a Novel Motion Simulator to Investigate Multisensory Path Integration in Three Dimensions at JoVE.com

MPI postdoc MB सी और टीएम स्टाइपेंड, कोरियाई (R31-2008-000-10008-0) एनआरएफ HHB. से कार्ल Beykirch तक धन्यवाद, तकनीकी सहायता और वैज्ञानिक चर्चा के लिए से माइकल Kerger और Joachim Tesch.

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ब्याज की कोई संघर्ष की घोषणा की.

पथ एकीकरण को हल करने के लिए जहां एक पर्यवेक्षक उत्पन्न किया मतलब है, लेकिन कोण एक के underestimates के लिए संभावना है के रूप में स्थापित किया गया है 5 के माध्यम से ले जाया गया है. हमारे परिणाम, translational आंदोलन के लिए, लेकिन केवल क्षैतिज विमान के भीतर इस शो. ऊर्ध्वाधर विमानों में प्रतिभागियों को अधिक कोण के माध्यम से चले गए के लिए अतिप्राक्कलन या कोई पूर्वाग्रह नहीं सब पर है की संभावना है. इन परिणामों क्यों इलाके तय से अधिक ऊंचाई के अनुमान से 10 अतिरंजित हो जाते हैं और एक इमारत की विभिन्न मंजिलों के बीच भी स्थानिक नेविगेशन 11 गरीब क्यों है समझा जा सकता है. इन परिणामों भी अणुकोश के रिश्तेदार अनुपात में जाना जाता है विषमताओं के लिए रिसेप्टर्स (0.58 ~~) 12 utricule से संबंधित हो सकता है. धीमी प्रतिक्रिया समय vestibular kinaesthetic जब दृश्य जानकारी मौजूद है तुलना में जानकारी अकेले के आधार पर पता चलता है कि वहाँ अतिरिक्त अकेले जड़त्वीय संकेत पर आधारित है एक मूल निर्धारित करने की कोशिश कर के साथ जुड़े में देरी, हो सकता है जोहाल ही में कि vestibular धारणा दिखा अध्ययन करने के लिए संबंधित हो सकती है धीमी गति के अन्य 13-16 होश के लिए तुलना में है. कुल मिलाकर हमारे परिणाम बताते हैं कि एक मूल का निर्धारण करने के लिए वैकल्पिक रणनीति जब खड़ी जो क्षैतिज विमान के भीतर है कि मनुष्य का अनुभव ज्यादातर आंदोलन तथ्य से संबंधित हो सकता है इस्तेमाल किया जा सकता है. इसके अलावा, जबकि अनुक्रमिक अनुवाद शायद ही अनुभव कर रहे हैं वे सबसे अक्सर बाण के समान विमान में होते हैं - जब हम की ओर चलने के लिए और एक चलती सीढ़ी पर कदम के रूप में जहां त्रुटियों को न्यूनतम कर रहे हैं. जबकि प्रयोग के बाद साक्षात्कार के विमानों के बीच विभिन्न रणनीति को प्रतिबिंबित नहीं था, प्रयोगों इस संभावना का पता लगाने चाहिए. स्वतंत्रता, अब पथ के अतिरिक्त डिग्री का उपयोग कर शरीर के साथ गुरुत्वाकर्षण के अलग केंद्रित सापेक्ष, के रूप में के रूप में अच्छी तरह से देखने के बड़े क्षेत्रों है जो अब MPI CyberMotion सिम्युलेटर के साथ संभव हो रहे हैं का उपयोग trajectories के साथ प्रयोग के लिए तीन आयामों में आगे पथ एकीकरण प्रदर्शन की जांच की योजना बनाई है.

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mpi cybermotion simulator: implementation of a novel motion simulator to investigate multisensory path integration in three dimensions

Path integration is a process in which self-motion is integrated over time to obtain an estimate of one's current position relative to a starting point 1. Humans can do path integration based exclusively on visual 2-3, auditory 4, or inertial cues 5. However, with multiple cues present, inertial cues - particularly kinaesthetic - seem to dominate 6-7. In the absence of vision, humans tend to overestimate short distances (&lt;5 m) and turning angles (&lt;30&deg;), but underestimate longer ones 5. Movement through physical space therefore does not seem to be accurately represented by the brain.
Extensive work has been done on evaluating path integration in the horizontal plane, but little is known about vertical movement (see 3 for virtual movement from vision alone). One reason for this is that traditional motion simulators have a small range of motion restricted mainly to the horizontal plane. Here we take advantage of a motion simulator 8-9 with a large range of motion to assess whether path integration is similar between horizontal and vertical planes. The relative contributions of inertial and visual cues for path navigation were also assessed.
16 observers sat upright in a seat mounted to the flange of a modified KUKA anthropomorphic robot arm. Sensory information was manipulated by providing visual (optic flow, limited lifetime star field), vestibular-kinaesthetic (passive self motion with eyes closed), or visual and vestibular-kinaesthetic motion cues. Movement trajectories in the horizontal, sagittal and frontal planes consisted of two segment lengths (1st: 0.4 m, 2nd: 1 m; &plusmn;0.24 m/s2 peak acceleration). The angle of the two segments was either 45&deg; or 90&deg;. Observers pointed back to their origin by moving an arrow that was superimposed on an avatar presented on the screen.
Observers were more likely to underestimate angle size for movement in the horizontal plane compared to the vertical planes. In the frontal plane observers were more likely to overestimate angle size while there was no such bias in the sagittal plane. Finally, observers responded slower when answering based on vestibular-kinaesthetic information alone. Human path integration based on vestibular-kinaesthetic information alone thus takes longer than when visual information is present. That pointing is consistent with underestimating and overestimating the angle one has moved through in the horizontal and vertical planes respectively, suggests that the neural representation of self-motion through space is non-symmetrical which may relate to the fact that humans experience movement mostly within the horizontal plane.

Watch this Scientific Journal Video about MPI CyberMotion Simulator: Implementation of a Novel Motion Simulator to Investigate Multisensory Path Integration in Three Dimensions at JoVE.com

MPI CyberMotion Simulator: Implementation of a Novel Motion Simulator to Investigate Multisensory Path Integration in Three Dimensions

कैसे मनुष्य स्वयं तीन आयामों में नेविगेट में जानकारी पाने के लिए एक कुशल वर्णित है. विधि परंपरागत सिमुलेटर द्वारा अप्राप्य मायनों में पर्यवेक्षकों चलती करने में सक्षम एक प्रस्ताव सिम्युलेटर का लाभ लेता है. परिणाम पुष्टि करते हैं कि क्षैतिज विमान में आंदोलन को कम करके आंका है, जबकि ऊर्ध्वाधर आंदोलन है overestimated है.

MPI CyberMotion सिम्युलेटर: एक उपन्यास प्रस्ताव सिम्युलेटर का कार्यान्वयन तीन आयाम में multisensory पथ एकता जांच

Path integration is a process in which self-motion is integrated over time to obtain an estimate of one's current position relative to a starting point 1. ...

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