Movement Science Exam 1 content

the ability to regulate or direct the mechanisms essential to movement correct answers motor control what 3 components make up the basic reflex arch correct answers receptor, conducting nervous pathway, effector Based on the ________ theory, reflexes are considered the basis of all movement a. ecological theory b. motor programming theory c. reflex theory d. systems theory correct answers c (reflex theory) this is a primitive reflex found in newborn humans that normally vanishes around 4 months of age. It is also known as the "fencing reflex" because of the characteristic position of the infant's arms and head, which resembles that of a classically trained fencer. - involves extension in the limbs on the "face side" - involves flexion in the limbs of the "occipital side" - occurs during head turns correct answers ATNR (asymmetrical tonic neck reflex) (As the head is turned, the arm and leg on the same side will extend, while the opposite limbs bend. The reflex should be inhibited by six months of age in the waking state.) (-Stimulus: rotation of the head to one side -Response: flexion of the skull limbs, extension of the jaw limbs -Strongest influence in supine/sitting position -Prolonged influence can result in scoliosis or even hip subluxation if there is marked hypertonia -If severe, grasping of objects with extended arm only possible if pt looks away from object Onset: birth, integrated 4-6 months -if persists, can interfere with bridging, rolling, hand to mouth, vusla tracking, hand use,) this is a primitive reflex that normally emerges during the first year of an infant's life and is diminished by the age of 9-10 months. It is a bridging or transitional brainstem reflex that is an important developmental stage and is necessary for a baby to transition from lying on the floor to quadruped crawling or walking - forward head flexion produces: flexion of the upper extremities and extension of the lower extremities - extension of the head produces: extension of the upper extremities and flexion of the lower extremities. correct answers STNR (symmetric tonic neck reflex) (Stimulus: flexion or extension of the head