Device and method for measuring reaction time

1. A manual neurological testing device for measuring a human subject's reaction time comprising:

a) a releasable holding member operable to be released by a human tester and free fall in response to the force of gravity and be subsequently grasped by the human subject;

b) a stimulus device fixedly coupled with said releasable holding member so as to free fall therewith in response to the force of gravity, said stimulus device operable to output a perceivable stimulus in response to free fall; and

c) a measurement device fixedly coupled with said releasable holding member so as to free fall therewith in response to the force of gravity, said measurement device operable to measure the human subject's reaction time for grasping said releasable holding member as said releasable holding member, said stimulus device, and said measurement device collectively free fall relative to said perceivable stimulus.

2. The manual neurological testing device according to claim 1 wherein said releasable holding member is a rigid member.

3. The manual neurological testing device according to claim 1 wherein said releasable holding member is a flexible member.

4. The manual neurological testing device according to claim 1 wherein said releasable holding member is a telescoping member.

5. The manual neurological testing device according to claim 1 wherein said measurement device operable to determine a recognition reaction time response accuracy.

6. The manual neurological testing device according to claim 1 wherein said measurement device comprises an accelerometer operable to detect acceleration of at least one of said releasable holding member and said measurement device.

7. The manual neurological testing device according to claim 1 wherein said stimulus device comprises a visual cue device.

8. The manual neurological testing device according to claim 1 wherein said stimulus device comprises an audible cue device.

9. The manual neurological testing device according to claim 1 wherein said stimulus device operable to output a plurality of distinct cues for eliciting a corresponding unique response by the subject.

10. The manual neurological testing device according to claim 1 wherein said stimulus device operable to output a plurality of distinct cues for eliciting a corresponding unique response by the subject, a first of said plurality of cues indicating a catch command to the subject, a second of said plurality of cues indicating a no-catch command to the subject.

11. The manual neurological testing device according to claim 1 , further comprising:

a spacer system for positioning the subject's appendage in a pre-test position.

12. The manual neurological testing device according to claim 1 , further comprising:

a spacer system for positioning the subject's appendage in a pre-test position, said spacer system having a proximity sensor operable to detect positioning of the subject's appendage.

13. The manual neurological testing device according to claim 1 , further comprising:

a spacer system for positioning the subject's appendage in a pre-test position, said spacer system having a body defining a predetermined dimension for positioning of the subject's appendage.

14. The manual neurological testing device according to claim 1 wherein said stimulus device operable to output a perceivable stimulus comprises said stimulus device outputting a perceivable stimulus in response to detection of said free fall of said releasable holding member.

15. A manual neurological testing device for measuring a subject's reaction time comprising:

a) a releasable holding member configured to free fall and then subsequently be grasped by the subject;

b) a control module coupled with said releasable holding member for free fall therewith, said control module comprising:

i) a displacement sensor operable to determine a predetermined onset and an offset of free fall motion of said releasable holding member in a vertical direction during free fall, said offset of free fall motion occurring when said releasable holding member and said control module collectively free fall and are then grasped by the subject;

ii) a controller connected to said displacement sensor, said controller comprising: a stimulus driving output and a timer on/off output; and

iii) a timing device in communication with said timer on/off output, said timing device operable to measure a period of time elapsed between said predetermined onset and said offset of motion of said releasable holding member and operable to send said period of time elapsed to said controller; and

c) a stimulus device coupled with said releasable holding member for free fall therewith to be perceived by the subject, said stimulus device in electronic communication with said controller and operable to output a stimulus in response to said stimulus driving output upon detection of said onset of free fall motion of said releasable holding member, said control module, and said stimulus device.

16. A method for manually measuring the reaction time in a subject, the method comprising:

(a) positioning a manual neurological testing device operable to measure the reaction time of the subject, said manual neurological testing device having a releasable holding member operable to free fall and then be grasped by the subject; a stimulus device coupled with said releasable holding member to free fall simultaneously therewith, said stimulus device outputting a perceivable stimulus; and a measurement device coupled with said releasable holding member and said stimulus device to free fall simultaneously therewith;

(b) releasing said releasable holding member, said stimulus device, and said measurement device collectively in free fall with or without said perceivable stimulus; and

(c) determining the time taken for the subject to grasp said releasable holding member during free fall after releasing said releasable holding member, said stimulus device, and said measurement device collectively.

17. The method according to claim 16 wherein said determining the time taken for the subject to grasp said releasable holding member comprises determining the time taken for the subject to grasp said releasable holding member using a plurality of sensors disposed on the subjects fingers.