Auditory Startle Response Diagnostic System for PTSD
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Solution Overview
Problem
Current diagnostic methods for PTSD are limited by the subjectivity of questionnaires, the high cost and limited availability of neuroimaging techniques, and the limited effectiveness of heart rate variability measurements, necessitating a more objective and practical biological marker for diagnosis.
Innovation Solution
A diagnostic system that measures acoustic startle reflex, including eyeblink and pupillary responses, post-auricular muscle response, intrinsic auricular muscle response, and prepulse inhibition, using earphones for auditory stimuli and display devices for prepulse stimuli, to provide a cost-effective and accurate method for diagnosing PTSD.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If neuroimaging methods (FMRI, MEG) are used to diagnose PTSD, then diagnostic accuracy is improved, but cost and availability deteriorate
Solution Approach 1:
The patent replaces expensive, complex neuroimaging equipment with inexpensive, portable acoustic stimulation devices and simple measurement tools (headphones, microphones, basic sensors) that can be deployed widely without requiring expensive infrastructure like MRI or MEG scanners
Solution Approach 2:
The patent substitutes complex mechanical and electromagnetic neuroimaging systems with a simpler acoustic-based measurement system that uses sound waves to elicit and measure startle responses, replacing sophisticated imaging technology with basic acoustics and signal processing
2Ease of operation
If heart rate variability is used to diagnose PTSD, then ease of measurement is improved, but diagnostic effectiveness deteriorates
Solution Approach 1:
The patent transitions from measuring heart rate variability to measuring acoustic startle response parameters (magnitude, latency, prepulse inhibition) which provide more specific and reliable diagnostic information about PTSD-related neural circuitry dysfunction while maintaining ease of measurement through non-invasive acoustic stimulation
3Ease of operation
If subjective questionnaires are used to diagnose PTSD, then ease of administration is improved, but reliability deteriorates
Solution Approach 1:
The patent replaces subjective self-report questionnaires with objective physiological measurements of acoustic startle response, eliminating observer and respondent bias while maintaining simple administration through automated acoustic stimulation and measurement protocols that require minimal patient involvement
Data Source
AI summary
A diagnostic system for measuring and analyzing startle response of a subject comprises a stimuli delivery circuitry, whereby startle stimuli and prepulse stimuli are delivered to the subject. Said diagnostic system comprises at least one sensor circuitry, whereby the startle response(s) of the subject are detected and recorded. Said sensor circuitry comprises at least one electrode and one eye response measuring system, such as a camera. Said diagnostic system comprises a diagnosis circuitry whereby the features of the startle response(s) and prepulse inhibition of the subject are extracted and analyzed. Said startle response(s) of said subject detected by said sensor circuitry comprise eye response, such as pupillary response and/or eyeblink response, post-auricular muscle response and intrinsic auricular muscle response.