"Loss" implies negative deficit like paralysis/blindness, but it commonly can be a "positive" deficit such as seizing. Change matches verbage in Criterion A for Conversion Disorder in the DSM 5 ("One or more symptoms of altered voluntary motor or sensory function"). Included qualifier that it is not explained by neurological condition as that is an important distinction/better describes psychiatric origin.
AMBOSS overview: "Patients present with neurological symptoms that cannot be fully explained by a neurological condition."
Clinical Features chart includes seizures and tremor as possible motor deficits
Source: AMBOSS - https://next.amboss.com/us/article/MP0M2T?q=conversion+disorder#Zfa03318ad9aeaedaac4cc232b95dca7c
| Patient complains of medical symptom that has no medical basis | |
|---|---|
| Patient believes there is something wrong (they are mistaken) | Patient is lying and knows there is nothing wrong |
| Conversion disorder (stress leads to motor or sensory alteration) | Factitious disorder (faking sick because they crave the sick role) |
| Somatic symptom disorder (many unexplained complaints) | Malingering (lies for gain) |
| Illness anxiety disorder (mild / nonexistent symptoms cause fear of serious illness) | |
