Normal Sensory Exam ; Two-Point Discrimination
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- Опубліковано 30 вер 2024
- Two-Point Discrimination
Two-point discrimination is tested by using calipers or a fashioned paper clip. The smallest and most dense sensory units are located in those areas that have the greatest somatosensory cortical representation. The patient should be able to recognize two-point separation of 2-4 mm on the lips and finger pads, 8-15 mm on the palms and 3-4 cm on the shins.
00:49 a mistake right?
Yes, she said 1 when the doctor (I'm assuming) pressed both ends of the caliper on her palm. This is due to the varying receptive fields on our dermis. Our fingertips are very sensitive to stimuli (the pricking); however, our palms are less sensitive as compared to the tips. Thus, it is harder to localize the stimulus on our palms. Our palms have larger receptive fields with *fewer* sensory receptors, in this case, tactile receptors responsible for touch. This means that the receptors are more spread out, but they have a larger receptive field. It is likely that only one receptor that has a large RF detected the stimulus, but only perceived it as one caliper end. Your comment was posted a year ago haha, but I have an exam tomorrow on this stuff so this is good study material!
@aworm I just took the "somatosensory sensation" lecture and here I am 😂😂
Elin duyusal muayenesinde kullanılır.Ayni anda iki farklı noktadan verilen stimulusun ayrı iki uyarı olduğunu anlama yeteneğini degerlendirir esteziometre ile ölçülür statik ve hareketli ölçümler ayrılır .elin parmal ve dorsal yüzeyinden özellikle parmak ucundan degelrnirme yapılır iki nokta ayrımı vücudun çeşitli kisimlarinda farklılık gösterir