12. The results of a two-point discrimination test on four skin areas are given
ID: 3522508 • Letter: 1
Question
12. The results of a two-point discrimination test on four skin areas are given in the table Complete the table by ranking the skin areas ve densities of sensory receptors (1 - highest density, 4 - lowest density). In the figure of the skin regions, A, B, C, and D, based on your ranking of sensory receptor density I through 4 according to the relative sensory sensory homunculus, identify the four labeled Two-Point Discrimination Test Area of Distance between Compass Points Relative Density of at Which Two-Point DiscriminationSensory Receptors Can Be Made (mm) Skin (ranked 1 to 4 5.0 mm 3.2 mm 8.6 mm 1.5 mm uj Provide a rationale for your answers 13. The following peripheral nerves are derived from the lumbar plexus Peripheral Nerve llioinguinal nerve Genitofemoral nerve Lateral femoral cutaneous nerveLL Femoral nerve Spinal Nerve Contributions L, Lt, L2 A functional assessment of the spinal nerves that form the lumbar plexus indicated a functional loss of spinal nerve L on the right side. How would this condition affect the nerves listed in the table? Would each nerve be equally affected? Explain your answer.Explanation / Answer
12.
Rational: the sensory neurons are more densely spaced in some body parts than others and the brain provides more space for processing signals around those regions.
13. L2 nerve is connected to the motor neurons of the thighs hence if it is damaged the other peripheral nerves which are connected to it will also show signs of motor dysfunction.
Only the nerves which are directly connected to the 2nd lumbar region will be affected.
AREA DISTANCE(mm) RELATIVE DENSITY SKIN REGION A 5 2 trunk B 3.2 3 forearm C 8.6 1 fingertips D 1.5 4 faceRelated Questions
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