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Understanding of fingernail-bone interaction and fingertip hemodynamics for fingernail sensor design (2002)
| Content Provider | CiteSeerX |
|---|---|
| Author | Mascaro, Stephen A. Asada, H. Harry |
| Description | Proc 10th Intl. Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems When the human fingertip is pressed against a surface or bent, the hemodynamic state of the fingertip is altered due to mechanical interactions between the fingernail and bone. Normal force, shear force, and finger extension/flexion all result in different patterns of blood volume beneath the fingernail. This phenomenon has been exploited in order to detect finger forces and finger posture by creating a photoplethysmograph “fingernail sensor, ” which measures the two-dimensional pattern of blood volume beneath the fingernail. In this paper, the anatomical structure of the fingertip is investigated in order to understand the various ways in which the bone and nail interact to alter the hemodynamic state of the fingertip. A qualitative nail-bone interaction model is created and used to explain the different blood volume patterns that result from each stimulus. The model is verified using experimental data from the fingernail sensor. The impact of this study on potential performance and application of the fingernail sensors is discussed. |
| File Format | |
| Language | English |
| Publisher Date | 2002-01-01 |
| Access Restriction | Open |
| Subject Keyword | Fingertip Hemodynamics Different Blood Volume Qualitative Nail-bone Interaction Model Mechanical Interaction Finger Force Normal Force Shear Force Two-dimensional Pattern Fingernail Sensor Blood Volume Fingernail-bone Interaction Various Way Hemodynamic State Different Pattern Fingernail Sensor Design Extension Flexion Finger Posture Nail Interact Photoplethysmograph Fingernail Sensor Potential Performance Experimental Data Anatomical Structure Human Fingertip |
| Content Type | Text |
| Resource Type | Article |