Tone-deaf, derived from the Japanese tone-deaf (おんち), refers to a person who is insensitive to sounds, especially a person with poor singing ability. Although many tone deaf people know that they are tone deaf, if they are receptive tone deafness (described later), it is usually not pointed out by others, and it is difficult for them to realize it.
Tone deafness is a music processing disorder, that is, the inability to recognize the differences between pitch, rhythm, melody, intensity or timbre. It is mainly manifested as tone recognition and expression disorders. Research shows that patients with aphonia have There are deficiencies in pitch change detection, pitch change resolution, and pitch change recognition.
Research statistics show that the prevalence of aphonia in the population is about 4%. According to reports, British biologist Darwin and the 32nd President of the United States Roosevelt were both born with aphonia.
Aphenasia:
Aphasia (also known as amusia) is commonly known as tone deafness, tone deafness or tone deafness. Studies have shown that patients with agiasia have poor performance in detecting pitch changes, There are deficiencies in both pitch change resolution and pitch change recognition. According to research statistics, the prevalence of aphonia in the population is about 4%. According to reports, British biologist Darwin and the 32nd President of the United States Roosevelt were both born with aphonia.
Just like prosopagnosia, aphonia is also divided into congenital and acquired. The former is born, and the latter is caused by some brain injuries (such as stroke, bruises, drugs, etc.) .
For congenital aphonia, scientists have found that the pitch processing impairment of patients with aphenia may be related to the abnormal connection between the right inferior frontal gyrus and the auditory cortex. In addition, other studies have found that aphonia patients The patient also had significantly lower gray matter concentrations in the left inferior frontal gyrus and left superior temporal sulcus.