These are the Youtube links from slide four:
Making the Voice Visible -Singing in the MRI with Tyley Ross –
Look at Me Now (Karmin Cover)–USC SPAN MRI
Scientists do ‘Baby it’s cold outside‘ – MRI of the vocal tract via Speech & Brain Research
Childhood Apraxia of Speech: Information for Parents
From the the last slide (REFERENCES)
Link to Mayo Clinic Video for Parents: Childhood Apraxia of Speech: Information for Parents