<prompt> A patient involved in a road traffic accident presents with quadriparesis, sphincter disturbance, sensory level up to the upper border of sternum and respiratory rate of 35minute. The likely level of lesion is:C1 - C2C4 - C5T1 - T2T3 - T4  <response>: b C4-C5- C2 dermatome - Occiput and top part of neck.- C3 dermatome - Lower part of neck up to the clavicle.- C4 dermatone - Area just below the clavicle Area which coincide with upper border of sternum.- Motor supply of upper-limb is C5-8 T1 - Motor supply of diaphragm Phrenic nerve is C3-5 - Thus C4 -C5 prolapse will cause increased respiratory rate with all mentioned features. 