Anterior spinal artery thrombosis is characterized by:
A. Loss of pain & touchB. Loss of vibration sense
C. Loss of power in lower limb
D. Sphincter dysfunction
E. venous plasma
leakage
The Answer is. (A) Loss of pain & touch; (C) Loss of power in lower limb (D) Sphincter
dysfunction
* Anterior spinal artery (single) supplies anterior
2/3rd of spinal cord, while posterior columns are supplied by
posterior spinal arteries (paired).
* Lesion (thrombosis, infarction) of anterior spinal
artery causes quadriplegia or paraplegia and dissociated sensory loss affecting
pain and temperature; but sparing vibration and position sense and loss of
sphincter function. It is sudden in onset and sharply demarcated.
* Vibration
senses affected with the lesion of posterior spinal artery.
