For a neck pain with that presentation, you should perform a neurological examination for his upper limb and lower limbs. Test his upper limbs and lower limbs for upper motor neuron and lower motor neuron signs by testing his muscle tone, hypertrophy or hypotrophy, deep tendon reflexes, ankle clonus, plantar response, superficial reflexes. muscle power, sensation to pin prick or light touch, Neck regidity, bladder and bowel control. Please, also check the local mobility testing in the neck and lumbar or thoracic spine to see any local signs or restrictions. There may be also a coexisting problem in the lumbar spine. Brief me about your clinical examination. Let us see what is there in the clinical testing.