Parietal Lobe Flashcards
Which areas are referred to as the somatosensory cortex?
Areas 1, 2, and 3 (postcentral gyrus).
What is the posterior parietal cortex?
The rest of the parietal lobe beyond the somatosensory cortex, including areas 5 and 7.
What happens when different areas of the somatosensory cortex are stimulated?
Tingling sensations occur in specific contralateral regions of the body.
How is the somatosensory cortex map different from the human body?
It is not continuous (e.g., head is separated from the face by the hand).
It is not scaled like the human body; areas like the mouth, fingers, and tongue are disproportionately large.
What causes somatosensory symptoms of parietal lobe lesions?
Often due to a stroke.
What is astatognosis?
The inability to recognize the tactile qualities of an object.
hat is blind touch, and how does it manifest?
A person cannot feel anything on one side of the body but can identify where they were touched when asked.
What is asomatognosia?
A loss of knowledge about one’s body or the condition of one’s body.
What is autotopagnosia?
The inability to localize or name body parts.
What is hemi-neglect, and which part of the brain is damaged in this condition?
Neglect of visual, auditory, and somatosensory stimulation on one side of the body.
Caused by right posterior parietal damage.
What symptoms did Patient P display due to a right parietal stroke?
Neglect of the left side of his body (e.g., dressing, shaving, lifting arms).
Only drew or read the right side of objects or words.
Unaware of anything being wrong.
What difficulty do parietal lobe patients have with spatial rotation?
Inability to rotate objects in space.
What causes Gerstmann syndrome?
left parietal lesions?
What is Gerstmann Syndrome?
Inability to write, read, speak, or use grammar properly.
What happens when both parietal lobes are damaged?
It causes Balint’s syndrome, the inability to see two objects presented simultaneously.
