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Torticollis is a fixed or dynamic tilt, rotation, with flexion or extension of the head and/or neck. The type of torticollis can be described depending on the positions of the head and neck. [1] [3] [4] laterocollis: the head is tipped toward the shoulder; rotational torticollis: the head rotates along the longitudinal axis towards the shoulder [5]
The toeprinting assay, also known as the primer extension inhibition assay, [1] is a method used in molecular biology that allows one to examine the interactions between messenger RNA and ribosomes or RNA-binding proteins. [2]
To further classify spasmodic torticollis, one can note the position of the head. Torticollis is the horizontal turning (rotational collis) of the head, and uses the ipsilateral splenius, and contralateral sternocleidomastoid muscles. This is the "chin-to-shoulder" version. Laterocollis is the tilting of the head from side to side.
The defining characteristic of BPT is a tilting of an infant's head in recurrent episodes, for varying periods of time. [ 1 ] [ 2 ] Furthermore, the child's trunk may bend in the same direction as the head, giving the baby an overall curved shape; this complaint is known as tortipelvis.
The asymmetrical tonic neck reflex (ATNR) in a two-week-old female, with extension of the left extremities and flexion of the right. The asymmetrical tonic neck reflex (ATNR) is a primitive reflex found in newborn humans that normally vanishes around 6 months of age.
The classical symptoms of the syndrome are spasmodic torticollis and dystonia. [3] [4] [5] Nodding and rotation of the head, neck extension, gurgling, writhing movements of the limbs, and severe hypotonia have also been noted. [3] Spasms may last for 1–3 minutes and may occur up to 10 times a day.
They are analogous to the knuckles of the hand, and are consequently known as toe knuckles in common speech. They are condyloid joints , meaning that an elliptical or rounded surface (of the metatarsal bones) comes close to a shallow cavity (of the proximal phalanges).
In head to head configuration this separation is only by two carbon atoms and the separation with tail to tail configuration is by four atoms. Head/tail configurations are not part of polymer tacticity but should be taken into account when considering polymer defects.