TABLE 1

Patient Clinical Characteristics

	Sex/Age (y)	Symptom duration	Dystonic posture			BT injection therapy before PET
Patient	Sex/Age (y)	Symptom duration	Rotation^*	Tilt^†	Anterocollis	Target muscles	Effect on dystonic posture
1	M/27	3 mo	R	−	−	NA	NA
2	M/24	1.5 y	R	R	−	SCM (L), CPV (R)	No improvement
3	M/42	2.5 y	L	−	−	SCM (R), SPC (L)	No improvement
4	M/62	7 mo	L	−	−	SCM (R), CPV (L)	No improvement
5	M/21	9 mo	R	L	+	SCM (L), uTz (L), Sc (L), SPC/SPc (L)	No improvement
6	M/46	4.5 y	L	L	+	NA	NA

↵* Side to which head was rotated.
↵† Side to which head was tilted.
− = negative; NA = not applicable; SCM = sternocleidomastoid; CPV = cervical paravertebral; SPC = splenius capitis; + = positive; uTz = upper trapezius; Sc = scalene; SPc = splenius cervicis.