50 yrs male Complaints of gradual weakness and muscle wasting of both upper limbs Expert opinion please doctors

An 16 years old male is having weakness of left upper limb with wasting over a period of last 6 months. Also gives history weaked grip of left hand . Apparently everything looks normal as no other symptoms What next should be done for further evaluation of this case

12 yr old boy with progressive weakness in all four limb and dysarthia.

38yrs old male patient with Peripheral neuropathy for last 4 years.Confirmed case of Leprosy,presented with a ulcer in left sole for 6 months.plz suggest treatment.

50 yrs male Complaints of gradual weakness of both upper limbs Expert opinion please doctors about the management