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NWHSU Mash CNS1 funt
NWHSU Mash CNS1 Neurofunction
| Question | Answer |
|---|---|
| A person has loss of pain and temperature in dermatomes T7-T12 bilaterally. All other sensations and voluntary motor control are normal. Mark the most likely site of a nonvascular lesion on the diagram and label the spinal segments involved. | ?draw large lesion around central canal, spinothalamic (neo and paleo) cross anterior to central canal ONLY T7-12 dermatomes are affected, no pain deficits below or above lesion. Motor control is not affected b/c not close enough to lesion. |
| A person complains of sudden onset paralysis of all muscles of facial expression on the left side of the face. Where is the lesion? | peripheral nerve problem along CN VII (Facial), bony canal where it enters on left |
| A person complains of sudden onset paralysis of all muscles of facial expression on the left side of the face. What other deficits may also be present: decreased salivation, decreased taste sensation, decreased pain on the entire side of the right face, d | ?decreased taste sensation, salvation |
| Consider a hemidissection of the R T3 spinal cord. Which of the following deficits is likely? Pain, discriminating touch, and voluntary motor control- r. arm, l. arm, r. leg, l. leg, no deficit | Pain: Left leg, DT: Right leg, voluntary motor control: right leg |
| Consider a RIGHT hemidissection of the C2 spinal cord. What areas will have a deficit in pain? What area will have a deficit in discriminating touch? Conscious proprioception? R arm, L arm, R leg, L leg, R cheek, R forehead | pain: L arm, L leg, R cheek; discriminating touch: R arm, R leg; conscious proprioception: R arm, R leg |
| Consider a hemidssection of the R C2 spinal cord. What sensory deficits are expected in the following: R arm; L leg; R cheek; R C2 dermatome from answer options: Pain; Discriminating touch; Conscious proprioception; No deficit expected | R arm: discrimingating touch, conscious proprioception; L leg: pain; R cheek: pain; R C2 dermatome: (all of them) pain, discriminating touch, conscious proprioception |
| Consider a right hemidissection of the C2 spinal cord. What deficits are expected in the R C2 dermatome? Pain, Crude touch, Vibration, Discriminating Touch | All of them: Pain, Crude touch, Vibration, Discriminating Touch |
| consider a lesion in the genu of the RIGHT internal capsule A) what sensory deficits are expected in the arms? B) what sensory deficits are expected in the face? | A) None only head/face B) all on left side |
| Consider an interruption of fibers of the R genu. Which of the following motor deficits are likely? Inability to chew on the right; Inability to smile on the left; Inability to close the left eye; Inability to open the right eye | Inability to smile on the left; Inability to close the left eye |
| Consider an anterior cavitation of the central canal in the T5-8 spinal cord. What areas of the body have a pain deficit? What areas have a DT deficit? | Pain: only dermatomes of T5-8 bilaterally, DT: none |
| consider an anterior cavitation of the central canal in the T5-8 spinal cord: A) which areas would have pain deficit B) which areas would have discriminating touch deficit | A) just dermatomes of T5-8 bilaterally B) none |
| Lesion with the following signs: loss of pain, temp, CT, and pressure in dermatomes T5-8 bilaterally. Where is the site of the lesion? | Ant. Commissure from T5-8 only |
| Occlusion of L. Posterior inferior cerebellar a. Pain, DT, and Voluntary motor deficits? | Pain: R arm and leg, DT: No deficit, voluntary motor control: no deficit expected |
| Occlusion of R. Anterior cerebral a. Which deficits is most likely? DT? Voluntary motor? R. leg, L. Leg, R. face, L. face, no deficit. | DT: L. Leg, Voluntary motor: L. Leg |
| Consider the reticular nuclei that project to autonomic nuclei. Which afferents to these reticular nuclei would be especially important for the control of blood pressure? | hypothalamus and visceral afferents |
| Consider the non-specific group of thalamic nuclei. In general, they project to ____. What tracts bring general sensation (from body and head)to nuclei? What is general function of nuclei? | ?cortex; paleospinothatlamic and ventral trigeminothalamic; interconnect or "associate" brain areas |
| give the source of afferents to non-specific group of thalamic nuclei: A) with general sensation from the body (name the tract) | paleospinothalamic |
| give the source of afferents to non-specific group of thalamic nuclei: B) with general sensation from the head | ventral trigeminothalamic tract |
| Give the source of afferents to the non-specific group of thalamic nuclei: w/ gen. sensation from body, gen sens from head, in pathway for reticular activation. | Paleospinothalamic tract, ventral trigeminothalamic tract, reticular nuclei. |
| Name 2 groups of fibers which bring general sensation to reticular nuclei from the spinal cord | ?spinoreticular, paleospinothalamic |
| Name the 2 major sources of information to the reticular nuclei that they use to affect homeostasis | ?all sensation, hypothalamus (a/efferent with autonomics and endocrine) |
| What information is carried by fasciculus cuneatus | T6 and up: discriminating touch, conscious proprioception; AND unconscious proprioception (cuneocerebellar tract) both from same side |
| What modalities are carried in the R. ventral trigeminothalamic tract at the level of the closed medulla? (include side) | L pain, temp, some crude touch and pressure (no DT from chief sensory of V b/c at mid pons level) |
| which region of cerebral cortex deals with personality, emotions, and judgement | prefrontal cortex (limbic) |
| What is the general function of nuclei of the subthalamus? | motor |
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AnatomyMash