Is my stuttering related to hypothyroidism? I am 15. I was diagnosed with a mild form of hypothyroidism 2 or 3 years ago. My father has a more...

Several neuroimaging studies have emerged in order to
identify areas associated with stuttering. Brain imaging studies have primarily been
focused on adults. In general, during stuttering, cerebral activities change
dramatically in comparison to silent rest or fluent speech between stutterers and
non-stutterers.

Studies utilizing title="Positron-emission tomography"
href="http://en.wikipedia.org/wiki/Positron-emission_tomography">positron-emission
tomography (PET) have found during tasks that invoke disfluent speech,
stutterers show href="http://en.wikipedia.org/wiki/Hypoactivity">hypoactivity in cortical
areas associated with language processing, such as href="http://en.wikipedia.org/wiki/Broca%E2%80%99s_area">Broca’s area, but
hyperactivity in areas associated with motor function. href="http://en.wikipedia.org/wiki/Stuttering#cite_note-Department_of_Psychology.2C_and_Center_for_the_Neural_Basis_of_Cognition.2C_University_of_Pittsburgh.2C_PA_15260.2C_USA.-13">[14]
One such study that evaluated the stutter period found that there was over activation in
the cerebrum and cerebellum, and relative deactivation of the left hemisphere auditory
areas and frontal temporal regions. href="http://en.wikipedia.org/wiki/Stuttering#cite_note-Bloodstein_1-38">[39]

In
non-stuttering, normal speech, PET scans show that both hemispheres are active but that
the left hemisphere may be more active. By contrast, stutterers yield more activity on
the right hemisphere, suggesting that it might be interfering with left-hemisphere
speech production. Another comparison of scans href="http://en.wikipedia.org/w/index.php?title=Anterior_forebrain&action=edit&redlink=1">anterior
forebrain regions are disproportionately active in stuttering subjects, while
post-rolandic regions are relatively inactive