Question

The following question regards cell physiology:

A.) A patient is brought into an emergency room and is awake and alert, but unable to see the right field of his vision. When you touch his right hand he can feel your touch and move his hand. He can speak but he doesn't make sense. He cannot comprehend simple commands. You suspect that he has suffered a stroke. What specific areas of the brain would you suspect were affected by this man's stroke, including hemisphere? You should pinpoint the area as well as you can, you can draw a picture if you wish. Explain how you pinpointed it. What nearby areas appear not to be affected by stroke?

B.) In class, we considered neural signals from the brain that decrease the sensation of pain. Where in the pain pathway do endorphins bind, and once they bind, how does that reduce our perception of pain?

Answer 1

As he cannot see in the right hemifield we suspect left part of the brain is inovolved ala the left hemisphere. As his touch is preserved that means the parietal lobe is well preserved . Talking and making no sense means it is the wernickes type of aphasia which occurs due wernickes area involvement which is located in the left side temporal lobe . So we pin pount the area of sroke to lefr sid etemporal lobe .

They bind to the opiate receptors in the dorsal horn of spinal cord . Thus they vlock the pathway of lateral spinothalamic ( which carries sensation of pain to the brain) and decrease the perception of pain