Method for the Diagnosis of Attention-Deficit/Hyperactivity Disorder

• US 20090005648A1
• Filed: 09/02/2005
• Published: 01/01/2009
• Est. Priority Date: 09/02/2004
• Status: Abandoned Application

• Current Assignee: Mclean Hospital (Mass General Brigham, Inc.)
• Original Assignee: Mclean Hospital (Mass General Brigham, Inc.)
• Inventors: Polcari, Ann, Teicher, Martin H.
• Application Number:
  US11/661,876
• Publication Number:
  US 20090005648A1
• Time in Patent Office: Days
• US Class Current: 600/300
• CPC Class Codes: A61B 5/1123 Discriminating type of movement, e.g. walking or running A61B5/1116, A61B5/112 take precedence
• CPC Class Codes: A61B 5/1127 using markers
• CPC Class Codes: A61B 5/168 Evaluating attention deficit, hyperactivity

Abstract

The invention provides methods for determining the attentional state of a subject. These methods are useful for diagnosing subjects with a psychological or behavioral disorder. The invention also features methods for determining the effect of a therapy on the attentional state of a subject.

Claims

1. A method of determining the attentional state of a subject comprising:

a) tracking movements of said subject;

b) presenting to said subject a sequence of a predetermined number of stimuli over a predetermined period of time, wherein said sequence comprises an array comprising target stimuli that vary in the duration of their presentation;

c) scoring the target stimuli responded to by said subject; and

d) determining the attentional state of said subject based on said movements and said scoring.

2. The method of claim 1, wherein said movements are tracked for a first time period before the presentation of said stimuli and for a second time period during the presentation of said stimuli, and wherein said movements during said first time period are compared to said movements during said second time period.

3. The method of claim 1, wherein said movements are tracked for a first time period starting at the presentation of one stimulus in said array and ending at the presentation of the next stimulus in said array, wherein said subject is instructed not to respond during said first time period;

and for a second time period starting at the presentation of one stimulus in said array and ending at the presentation of the next stimulus in said array, wherein said subject is instructed to respond during said second time period, wherein said movements during said first time period are compared to said movements during said second time period.

6. The method of claim 1, wherein said duration of stimuli presentation is between 100 milliseconds and 400 milliseconds.

7. The method of claim 1, wherein said stimuli are visual symbols.

9. The method of claim 7, wherein said visual symbols are presented at different locations on a screen.

10. The method of claim 7, wherein said method further comprises masking symbols in said array, wherein each of said masking symbols suppresses the afterimage created on the retina of said subject by the stimulus that precedes each of said masking symbols in said array.

11. The method of claim 10, wherein each of said masking symbols is presented for a time interval of from 100 to 2000 milliseconds.

12. The method of claim 1, wherein said stimuli are audio sounds.

13. The method of claim 12, wherein said sounds are presented at different locations in a room.

16. The method of claim 1, wherein said method further comprises scoring the target stimuli not responded to by said subject.

17. The method of claim 1, wherein said method further comprises scoring the non-target stimuli responded to by said subject.

18. The method of claim 1, wherein said method further comprises scoring the target stimuli not responded to by said subject and scoring the non-target stimuli responded to by said subject.

19. The method of claim 1, wherein said method is used to diagnose a psychological or behavioral disorder.

20. The method of claim 19, wherein said disorder is depression, an anxiety disorder, schizophrenia, drug addiction, an eating disorder, attention deficit disorder, attention deficit hyperactivity disorder, hyperkinetic disorder, a learning disorder, Alzheimer'"'"'s disease, dementia, epilepsy, stroke, or traumatic brain injury.

22. The method of claim 20, wherein said disorder is attention deficit disorder.

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27. A method of determining the attentional state of a subject comprising:

tracking the movements of said subject;

presenting to said subject a sequence of a predetermined number of stimuli over a predetermined period of time, wherein said sequence comprises an array comprising unconditional target stimuli and working memory stimuli that can function as target stimuli;

scoring the target stimuli responded to by said subject; and

determining the attentional state of said subject based on an evaluation of said subject'"'"'s movements and said scoring of target stimuli responded to.

28. The method of claim 27, wherein said movements are tracked for a first time period before the presentation of said stimuli and for a second time period during the presentation of said stimuli, wherein said evaluation is based on a comparison of said movements during said first time period and during said second time period.

29. The method of claim 27, wherein said movements are tracked for a first time period starting at the presentation of one stimulus in said array and ending at the presentation of the next stimulus in said array, wherein said subject does not respond during said first time period;

and for a second time period starting at the presentation of one stimulus in said array and ending at the presentation of the next stimulus in said array, wherein said subject responds during said second time period, wherein said evaluation is based on a comparison of said movements during said first time period and during said second time period.

30. The method of claim 27, wherein said method further comprises scoring the number of said working memory stimuli that function as target stimuli responded to by said subject.

34. The method of claim 27, wherein said method further comprises measuring a first time period required for said subject to respond to one of said unconditional target stimuli and a second time period required for said subject to respond to one of said working memory stimuli, wherein said scoring is based on a comparison of said first time period and said second time period.

35. The method of claim 27, wherein said working memory stimuli function as said target stimuli based on a predetermined positional relationship in said array.

36. The method of claim 27, wherein said stimuli are visual symbols.

38. The method of claim 36, wherein said method further comprises masking symbols in said array, wherein each of said masking symbols suppresses the afterimage created on the retina of said subject by the stimulus that precedes each of said masking symbols in said array.

39. The method of claim 38, wherein each of said masking symbols is presented for a time interval of from 500 to 2000 milliseconds.

40. The method of claim 27, wherein said stimuli are audio sounds.

41. The method of claim 40, wherein said sounds are presented at different locations in a room.

44. The method claim 27, wherein each of said target stimuli is presented for a time interval of between 100 milliseconds and 400 milliseconds.

45. The method of claim 44, wherein the duration of said time interval varies over said predetermined period of time.

48. The method of claim 27, wherein said method is used to diagnose a psychological or behavioral disorder.

49. The method of claim 48, wherein said disorder is depression, an anxiety disorder, schizophrenia, drug addiction, an eating disorder, attention deficit disorder, attention deficit hyperactivity disorder, hyperkinetic disorder, a learning disorder, Alzheimer'"'"'s disease, dementia, epilepsy, stroke, or traumatic brain injury.

51. The method of claim 49, wherein said disorder is attention deficit disorder.

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55. A method of determining the effects of a therapy on the attentional state of a subject, said method comprising the steps of:

a) tracking the movements of said subject;

presenting to said subject a sequence of a predetermined number of stimuli over a predetermined period of time, wherein said sequence is an array comprising unconditional target stimuli and working memory stimuli;

scoring the target stimuli responded to by said subject;

determining the attentional state of said subject based on an evaluation of said movements and said scoring;

b) administering said therapy; and

c) repeating steps a) and b), wherein a difference in said attentional state before and after step b) indicates that said therapy has an effect on the attentional state of said subject.

56. The method of claim 55, wherein said method further comprises scoring the number of said working memory stimuli that function as target responded to by said subject in step a).

59. The method of claim 55, wherein said method further comprises scoring the target stimuli not responded to by said subject and scoring the non-target stimuli responded to by said subject.

60. The method of claim 55, wherein said working memory stimuli function as said target stimuli based on a predetermined positional relationship in said array.

66. The method claim 55, wherein each of said target stimuli is presented for a time interval of between 100 milliseconds and 400 milliseconds.

67. The method of claim 66, wherein the duration of said time interval varies over said predetermined period of time.

68. The method claim 55, wherein said method further comprises masking symbols in said array, wherein each of said masking symbols suppresses the afterimage created on the retina of said subject by the stimulus that precedes each of said masking symbols in said array.

69. The method of claim 68, wherein each of said masking symbols is presented for a time interval of from 500 to 2000 milliseconds.

70. The method of claim 69, wherein the duration of said time interval varies over said predetermined period of time.

78. The method of claim 55, wherein said method is used to determine the preferred therapy for the treatment of a psychological, neurological, or behavioral disorder.

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