Abnormal pyramidal sign SNOMEDCT_US:14648003 HP:0007161 pyramidal signs are a subset of long-tract signs that specifically indicate corticospinal tract involvement. The more general term long-tract sign refers to a clinical findings related to damage to the long white matter tracts of the CNS, particularly the corticospinal tract, dorsal columns, and the spinothalamic tract. HP:0007275 UMLS:C0234132 HP:0007256 Functional neurological abnormalities related to dysfunction of the pyramidal tract. Pyramidal tract signs HP:0007225 HP:0007324 HP:0007347 Corticospinal signs HP:0003488 Pyramidal signs Abnormal central motor function