What causes left superior quadrantanopia?

What causes left superior quadrantanopia?

A superior quadrantanopia results from an insult to the optic radiation inferiorly in the temporal lobe, resulting in a ‘pie in the sky’ type of visual field defect (Figure 1d), while an inferior quadrantanopia is caused by damage to the parietal lobe optic radiation (Figure 1e).

What is superior visual field defect?

A visual field defect is a loss of part of the usual field of vision, so it does not include severe visual impairment of either one eye or both. The lesion may be anywhere along the optic pathway; retina to occipital cortex.

What does quadrantanopia mean?

Quadrantanopia refers to the loss of vision in one of the quarters of the visual field. Quadrantanopia can also result in significant constraints of one’s vision and ability to perform daily life activities (including the possible withdrawal of driving permission), but is – obviously –less severe than hemianopia.

Where is Myer’s loop?

temporal lobe
The Meyer loop (also sometimes known as Archambault loop) is part of the inferior optic radiation that sweeps back on itself into the temporal lobe, just lateral to the temporal horn of the lateral ventricle.

What is the Geniculostriate pathway?

Noun. geniculostriate pathway (plural geniculostriate pathways) (anatomy) A group of axons that connect neurons in the lateral geniculate nucleus to the primary visual cortex.

Where is Meyer’s loop?

What does the superior colliculus do?

The superior colliculus (SC) is a midbrain area where visual, auditory and somatosensory information are integrated to initiate motor commands. The SC plays a central role in visual information processing in the mouse; it receives projections from 85% to 90% of the retinal ganglion cells (RGCs).

What is superior quadrantanopia?

Right homonymous superior quadrantanopia. The areas of the field lost in each eye are shown as black areas. This visual field defect is characteristic of damage to Meyer’s loop on the left side of the brain. Quadrantanopia, quadrantanopsia, refers to an anopia affecting a quarter of the field of vision.

What is the clinical setting for lower quadrantanopia?

Remarkably enough, it is difficult to find the clinical setting in which lower quadrantanopia is found; it is even more difficult to determine whether the quadrantanopia indicates a deep cleft of infarction reaching the visual radiation or whether it may occur in a more superficial infarct.

Which specialist consultations are beneficial to patients with superior quadrantanopia (QP)?

While the neuro-ophthalmologist is almost always involved in the care of patients with homonymous superior quadrantanopia, it is important to consult with an interprofessional team of specialists that include a neurologist, neurosurgeon, and neuroradiologist.

What is quadrantanopia stroke?

Quadrantanopia is a condition associated with the temporal and parietal region of brain. It also involves the occipital lobe concerned with vision. Any kind of head injury or specific site injury regarding vision may lead to Quadrantanopia stroke.