This month, an unusual variant of Guillain Barre syndrome - the pharyngeal cervical brachial variant. Benjamin Wakeley, a consultant neurologist at the Gloucester Hospitals NHS Foundation trust talks through what clinicians need to know.Also, a look at an uncommon but difficult to resolve complication of Parkinson’s disease therapy - that of dopamine dysregulation syndrome. Robert Cilia, from the Parkinson Institute in Milan, discusses his paper examining the characterisation, management and long-term outcome.If you found that useful you may want to listen to our accompanying podcast on impulse control disorder in Parkinson’s disease, produced with the British Neuropsychiatry association. David Okai, a consultant in psychological medicine in Oxford discusses assessing and managing the disorder. Listen here: goo.gl/gEsUUARead the articles:Dopamine dysregulation syndrome in Parkinson's disease: from clinical and neuropsychological characterisation to management and long-term outcome goo.