Which clinical manifestations in an infant would be suggestive of spinal muscular atrophy (Werdnig-Hoffmann disease)?

Name: Which clinical manifestations in an infant would be suggestive of spinal muscular atrophy (Werdnig-Hoffmann disease)?
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The infant lies in the frog position with the legs externally rotated, abducted, and flexed at the knees. The deep tendon reflexes are absent. The child has hypotonia and inactivity as the most prominent features. The motor deficits are bilateral.

Which Clinical Manifestations in an Infant Would Be Suggestive of Spinal