Damage to the following areas produces symptoms (from medial to lateral): Structure affected Effect Lateral spinothalamic tract Contralateral loss of pain and temperature from the trunk and extremities. Facial nucleus & facial Nerve (CN.VII) (1) Ipsilateral paralysis of the upper and lower face (lower motor neuron lesion). (2) Ipsilateral loss of lacrimation and reduced salivation. (3) Ipsilateral loss of taste from the anterior two-thirds of the tongue. (4) Loss of corneal reflex (efferent limb). Principal sensory trigeminal nucleus and tract Ipsilateral loss of all sensory modalities to the face (facial hemianesthesia) Vestibular Nuclei and intraaxial nerve fibers Nystagmus, nausea, vomiting, and vertigo Cochlear nuclei and intraaxial nerve fibers Hearing loss - ipsilateral central deafness Middle & inferior cerebellar peduncle Ipsilateral limb and gait ataxia Descending sympathetic tract Ipsilateral Horner's syndrome (ptosis, miosis, & anhydrosis)
Lateral pontine syndrome
Medial pontine syndrome
Cerebellar stroke syndrome
Lateral medullary syndrome
Occipital horn syndrome
Brainstem stroke syndrome
Medial medullary syndrome
Vestibulocerebellar syndrome