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| tonic_downgaze_children [2026/09/20 10:34] – Scott Larson | tonic_downgaze_children [2026/09/20 10:34] (current) – [Causes] Scott Larson | ||
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| * **Benign (idiopathic) PTD** — Otherwise healthy term infants; transient, typically resolves by ~6 months; normal neuroimaging and no sequelae. Proposed mechanism: immaturity/ | * **Benign (idiopathic) PTD** — Otherwise healthy term infants; transient, typically resolves by ~6 months; normal neuroimaging and no sequelae. Proposed mechanism: immaturity/ | ||
| * **Transient tonic downgaze in preterm infants** — Extremely preterm infants (22–28 weeks), onset at 36–38 weeks postmenstrual age; episodes often provoked by stimuli or feeding. | * **Transient tonic downgaze in preterm infants** — Extremely preterm infants (22–28 weeks), onset at 36–38 weeks postmenstrual age; episodes often provoked by stimuli or feeding. | ||
| - | * **Symptomatic tonic downgaze from CNS injury** — Associated with hypoxic-ischemic injury/ | + | * **Tonic downgaze from CNS injury** — Associated with hypoxic-ischemic injury/ |
| * **Other structural causes to exclude** — Raised intracranial pressure/ | * **Other structural causes to exclude** — Raised intracranial pressure/ | ||