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      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleC documentId="RetDoc1039500001">
      <Expended527ActivitiesAmt>0</Expended527ActivitiesAmt>
      <InternalFundsContributedAmt>0</InternalFundsContributedAmt>
      <SubstantiallyAllDuesNondedInd>0</SubstantiallyAllDuesNondedInd>
      <OnlyInHouseLobbyingInd>1</OnlyInHouseLobbyingInd>
      <AgreeCarryoverPriorYearInd>0</AgreeCarryoverPriorYearInd>
    </IRS990ScheduleC>
    <IRS990ScheduleF documentId="RetDoc1040500001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <AccountActivitiesOutsideUSGrp>
        <SpecificServicesProvidedTxt>ANNUAL CONFERENCE</SpecificServicesProvidedTxt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>NORTH AMERICA</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>GRANTS TO RECIPIENTS LOCATED IN REGION</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>25000</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <SubtotalOfficesCnt>0</SubtotalOfficesCnt>
      <SubtotalEmployeesCnt>0</SubtotalEmployeesCnt>
      <ContinuationTotalOfficeCnt>0</ContinuationTotalOfficeCnt>
      <ContinuationTotalEmployeeCnt>0</ContinuationTotalEmployeeCnt>
      <TotalOfficeCnt>0</TotalOfficeCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <SubtotalSpentAmt>25000</SubtotalSpentAmt>
      <ContinuationSpentAmt>0</ContinuationSpentAmt>
      <TotalSpentAmt>25000</TotalSpentAmt>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>NORTH AMERICA</RegionTxt>
        <PurposeOfGrantTxt>DEVELOPMENT AND VALIDATION OF AN ARTIFICIAL INTELLIGENCE AUGMENTED VIDEO MOTION ANALYSIS TOOL FOR REMOTE SCREENING OF EXTREMITY DYSFUNCTION IN PATIENTS WITH CEREBRAL PALSY</PurposeOfGrantTxt>
        <CashGrantAmt>25000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>CHECK</MannerOfCashDisbursementTxt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
      </GrantsToOrgOutsideUSGrp>
      <TransferToForeignCorpInd>0</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>0</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>0</ForeignPartnershipInd>
      <BoycottCountriesInd>0</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>PURSUANT TO THE TERMS OF THE GRANTS, RECIPIENTS MUST SUBMIT AN INTERIM PROGRESS REPORT BY DECEMBER 1, 2023, AND MUST PRESENT THEIR FINDINGS AT A FUTURE ASPN MEETING (2024 OR 2025). FURTHERMORE, A FINAL REPORT IS DUE BY JUNE 1, 2025.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 3:</FormAndLineReferenceDesc>
        <ExplanationTxt>ACCRUAL METHOD OF ACCOUNTING</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART II, LINE 1:</FormAndLineReferenceDesc>
        <ExplanationTxt>ACCRUAL METHOD OF ACCOUNTING</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleF>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE I, PART I, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>SEE PART III, LINE 4B</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART 1, LINE 6 TOTAL NUMBER OF VOLUNTEERS:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE TOTAL NUMBER OF VOLUNTEERS REPORTED ON PART 1, LINE 6 INCLUDES THE 6 OFFICERS OF THE ORGANIZATION WHO SERVE WITHOUT COMPENSATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART III, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>SEE DETAILED DESCRIPTION ON FORM 990, PART III, LINE 4B.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>DUES PAYING MEMBERS ELECT DIRECTORS/OFFICERS OF THE CORPORATION AT THE ORGANIZATION'S ANNUAL MEETING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>DUES PAYING MEMBERS ELECT DIRECTORS/OFFICERS OF THE CORPORATION AT THE ORGANIZATION'S ANNUAL MEETING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE 2023 FORM 990 WAS REVIEWED BY THE TREASURER PRIOR TO FILING WITH THE IRS. FORM 990 WAS ALSO REVIEWED BY THE OTHER OFFICERS PRIOR TO THE ORGANIZATION'S ANNUAL MEETING IN JANUARY 2024.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>EACH ASPN MEMBER AND OFFICER IS EXPECTED TO APPROPRIATELY NOTIFY THE EXECUTIVE COMMITTEE AND SCIENTIFIC PROGRAM CHAIR OF THE ANNUAL MEETING OF ANY CONFLICTS OF INTEREST AS THEY ARISE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE GOVERNING DOCUMENTS ARE NOT MADE AVAILABLE TO THE PUBLIC. THE ORGANIZATION DOES NOT CURRENTLY HAVE A CONFLICT OF INTEREST POLICY AND DOES NOT PREPARE FORMAL FINANCIAL STATEMENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VII CONTACT ADDRESSES FOR OFFICERS, DIRECTORS, ETC</FormAndLineReferenceDesc>
        <ExplanationTxt>GERALD GRANT, MD - 20 DUKE MEDICINE CIRCLE, CLINIC 3-1, DURHAM, NC 27710. JOHN C. WELLONS, III, MD - 2200 CHILDREN'S WAY, DOT 9222, NASHVILLE, TN 37232. SHENANDOAH ROBINSON, MD - PHIPPS 556, 600 N. WOLFE ST, BALTIMORE, MD 21287. BRADLEY WEPRIN, MD, MHCM - 1935 MEDICAL DISTRICT DR, DALLAS, TX 75235. ABHAYA KULKARNI, MD, PHD, FRCSC - 555 UNIVERSITY AVENUE, ROOM 1503, TORONTO, ONTARIO, CANADA M5G 1X8. SUSAN DURHAM, MD - 4650 SUNSET BLVD., LOS ANGELES, CA 90027.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>