<unk>  is deep, dull ache, episodic
History of excessive or unaccustomed activity<unk>  is localized and asymmetric
Referred<unk> : head (upper cervical segments), limb girdle (lower cervical segments)
Symptoms aggravated by<unk>  movement, relieved by rest<unk>  is sharp or burning
Radiates to trapzezial and periscapular areas or down arm
Numbness/weakness in myotomal distribution
Headache may occur if upper cervical roots are involved
Symptoms aggravated by<unk>  hyperextension (esp when head is toward affected extremity)
Gradual onset of shocklike sensations spreading down spine to extremities
Most common at level of 5th cervical vertebra (shoulder abduction, external rotation)
Neck pain
Musculoskeletal
Chest pain 
Torticollis
Chest wall pain
Dystonic reaction
Sore throat
Cervical spondylosis