keepgoing
Forum Fanatic
Topics: 104
Posts: 2,236
|
MIDBRAIN LESION---
1. Weber's syndrome
Fibres of III.
Descending motor fibres in cerebral peduncle.
Ipsilateral oculomotor palsy.
Contralateral hemiplegia
2. Benedikt's syndrome
Fibres of III.
Descending motor fibres in cerebral peduncle.
Red nucleus and nearby cerebellothalamic fibres.
Ipsilateral oculomotor palsy.
Contralateral hemiplegia.
Contralateral tremor.
(Tremor is usually attributed to interruption of cerebellothalamic fibres but it may be continuous, from involvement of pallidothalamic fibres rostral to the red nucleus)
3. Parinaud's syndrome
Pressure on superior colliculi, usually by a pineal tumour, is transmitted to pre-oculomotor nuclei in region of posterior commissure and periaqueductal region
Paralysis of upward gaze and convergence, often accompanied by other pupillary and eye movement abnormalities.
Various pre-oculomotor nuclei, concerned with vertical eye movements, are present in the affected region.
___________________
"You must feel confident enough within urself to follow your own dreams"If you think you can, you can.If you think you can't, you're right"
|
| keepgoing
Forum Fanatic
Topics: 104
Posts: 2,236
|
PONTINE LESIONS
1.Millard-Gubler syndrome
Facial motor nucleus and fibres of VII.
Descending motor fibres (but most are ventral to the lesion).
Ipsilateral lower motor neuron facial paralysis.
Contralateral upper motor weakness of limbs (which recovers with time)
2. Raymond's syndrome
Descending motor fibres.
Fibres of abducens nerve
Contralateral hemiplegia.
Ipsilateral VI nerve palsy (but no abnormality of movements of contralateral eye).
3. Foville's syndrome
Abducens nucleus.
Facial motor nucleus
Ipsilateral VI nerve palsy and inability of the contralateral eye to adduct when attempting a conjugate movement. The contralateral eye does adduct with convergence to look at a near object.
Ipsilateral lower motor neuron facial paralysis.
___________________
"You must feel confident enough within urself to follow your own dreams"If you think you can, you can.If you think you can't, you're right"
|
|
| |
| | |
