ReviewSocial cognition in temporal lobe epilepsy: A systematic review and meta-analysis

- TLE is associated with deficits in ToM and emotion recognition.
- There are no significant differences between TLE patients with and without temporal lobectomy.
- Right sided TLE is associated with more severe deficits in recognition of fear, sadness and disgust.
- The trajectory of deficits in social cognition in TLE should be investigated with longitudinal studies.

ObjectiveThere is increasing evidence suggesting that social cognitive abilities are impaired in temporal lobe epilepsy (TLE), the most common form of focal epilepsies.MethodsIn this meta-analysis, 31 studies investigating theory of mind (ToM) and facial emotion recognition performances of 1356 patients with TLE (351 postsurgery) and 859 healthy controls were included.ResultsPatients with TLE had significant deficits in ToM (d = 0.73-0.89) and recognition of facial emotions. There were no significant differences in severity of social cognitive deficits between patients with TLE with or without medial temporal lobectomy. Earlier onset of seizures was associated with ToM impairment. Right-sided TLE was associated with more severe deficits in recognition of fear, sadness, and disgust.ConclusionsSocial cognitive information processing is impaired in TLE, and the potential role of these deficits in functional impairment needs to be further investigated.