ⓘ Sixth nerve palsy

                                     

ⓘ Sixth nerve palsy

Sixth nerve palsy, or abducens nerve palsy, is a disorder associated with dysfunction of cranial nerve VI, which is responsible for causing contraction of the lateral rectus muscle to abduct the eye. The inability of an eye to turn outward and results in a convergent strabismus or esotropia of which the primary symptom is diplopia in which the two images appear side-by-side. Thus the diplopia is horizontal and worse in the distance. Diplopia is also increased on looking to the affected side and is partly caused by overaction if the medial rectus on the unaffected side as it tries to provide the extra innervation to the affected lateral rectus. These two muscles are synergists or "yoke muscles" as both attempt to move the eye over to the left or right. The condition is commonly unilateral but can also occur bilaterally.

Unilateral paralysis of the abducens nerve is the most common isolated palsy of the oculomotor nerve.

                                     
  • Fourth nerve palsy - Trochlear nerve IV Sixth nerve palsy - Abducens nerve VI Other Trigeminal neuralgia - Trigeminal nerve V Facial nerve paralysis
  • left - sided sixth nerve palsy as an initial sign. Thus a right - sided sixth nerve palsy does not necessarily imply a right - sided cause. Sixth nerve palsies are
  • Oculomotor nerve palsy is an eye condition resulting from damage to the third cranial nerve or a branch thereof. As the name suggests, the oculomotor nerve supplies
  • Fourth cranial nerve palsy is a condition affecting cranial nerve 4 IV the trochlear nerve which is one of the cranial nerves. It causes weakness
  • For acquired fourth nerve palsy see fourth nerve palsy Congenital fourth nerve palsy is a condition present at birth characterized by a vertical misalignment
  • motor neuron lesions can result in a CNVII palsy Bell s palsy is the idiopathic form of facial nerve palsy manifested as both upper and lower facial
  • abduction. A sixth nerve palsy also known as abducens nerve palsy is a neurological defect that results from a damaged or impaired abducens nerve This damage
  • increased intracranial pressure can cause both papilledema and a sixth abducens nerve palsy papilledema can be differentiated from papillitis if esotropia
  • characteristically arises from the anterior rami of three spinal nerve roots: the fifth, sixth and seventh cervical nerves C5 - C7 although the root from