Parietal Lobes

3. Non-dominant

4. Dominant

No longer aware of opposite (left-sided) limbs - even when densely hemiparetic; denies weakness

- ANOSOGNOSIA. Difficulty in dressing, e.g. getting arm into pyjamas -DRESSING APRAXIA. Disturbance of geographical memory

- GEOGRAPHICAL AGNOSIA (e.g. patient cannot find his bed in ward). Cannot copy geometrical pattern

- CONSTRUCTIONAL APRAXIA

These comprise GERSTMANN'S SYNDROME

Confusion of right and left limbs. Difficulty in distinguishing fingers on hand -FINGER AGNOSIA. Disturbance of calculation - ACALCULIA Disturbance of writing - AGRAPHIA.

5. Damage to the optic radiation deep in the parietal lobe will produce a lower homonymous quadrantanopia

TEMPORAL LOBES

Lateral surface

Coronal section

Angular gyrus

Lateral surface

Superior temporal gyrus and sulcus

Middle temporal gyrus

Anteriorly, the temporal lobe is separated from the frontal lobe by the lateral sulcus. Posteriorly and superiorly, separation from occipital and parietal lobes is less clearly defined.

The lateral sulcus is deep and contains 'buried' temporal lobe. The buried island of cortex is referred to as the INSULA.

The temporal lobe also has a considerable inferior and medial surface in contact with the middle fossa.

Insula

Inferior temporal -- gyrus and sulcus

Coronal section

Angular gyrus

Insula

Inferior temporal -- gyrus and sulcus

Inferior surface

Corpus callosum

Lateral ventricles

Optic chiasma

Inferior horn of lateral ventricle

Stem of lateral sulcus

-Uncus

Inferior surface

Stem of lateral sulcus

-Uncus

Parahippocampal gyrus

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