<prompt> A patient involved in a road traffic accident presents with quadriparesis, sphincter disturbance, sensory level up to the upper border of the sternum and a respiratory rate of 35minute. The likely level of lesion is -CI-C2C4- C5T1 - T2T3 - T4  <response>: First, see the sensory distribution of the lower neck upper trunk.C2 dermatome Occiput top part of the neck.C3 dermatome Lower part of neck upto the clavicle.C4 dermatone Area just below the clavicle Area which coincides with the upper border of the sternumMotor supply of upper-limb is C5_8 T,Motor supply of diaphragm Phrenic nerve is C3_5Now the findings of the patient in question:-Li Patient has quadriparesis i.e. weakness of upper as well lower limbs p lesion should be above or at C5 dermatome upper limb has motor supply C5_8 T1Sensory loss up to the upper border of sternum C4 areaRespiratory rate 35minute preservation of respiratory function with increased rate. Lesion at C4_5 level is consistent with preserved respiratory function and increased respiratory rate.So, the lesion is at C4_5 level. 