Lin-Wei Ooi, Xian Leonard Leong Sang, Shen Vincent Tee Wei, Chuan Chee Yong, Halim Sanihah Abdul, Ghani Abdul Rahman Izani, Idris Zamzuri, Abdullah Jafri Malin
Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia.
Hospital Universiti Sains Malaysia, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia.
Malays J Med Sci. 2021 Apr;28(2):48-62. doi: 10.21315/mjms2021.28.2.5. Epub 2021 Apr 21.
The deep tendon reflex (DTR) is a key component of the neurological examination. However, interpretation of the results is a challenge since there is a lack of knowledge on the important features of reflex responses such as the amount of hammer force, the strength of contraction, duration of the contraction and relaxation. The tools used to elicit the reflexes also play a role in the quality of the reflex contraction. Furthermore, improper execution techniques during the DTR assessment may alter the findings and cloud the true assessment of the nervous system. Therefore, understanding the basic principles and the key features of DTR allows for better interpretation of the reflex responses. This paper discusses the brief history of reflexes, the development of the reflex hammer, and also the key features of a reflex response encompassing the amplitude of force needed to elicit a reflex response, the velocity of contraction, the strength of contraction, and the duration of contraction and relaxation phases. The final section encloses the techniques of eliciting DTR in the upper extremities, trunk, and lower extremities, and the interpretation of these reflexes.
深腱反射（DTR）是神经学检查的关键组成部分。然而，由于缺乏对反射反应重要特征的了解，如锤击力度、收缩强度、收缩和舒张持续时间等，对结果的解读颇具挑战。用于引发反射的工具也会对反射收缩的质量产生影响。此外，在DTR评估过程中执行技术不当可能会改变检查结果，使对神经系统的真实评估变得模糊。因此，了解DTR的基本原理和关键特征有助于更好地解读反射反应。本文讨论了反射的简史、反射锤的发展，以及反射反应的关键特征，包括引发反射反应所需的力的幅度、收缩速度、收缩强度以及收缩和舒张阶段的持续时间。最后一部分介绍了在上肢、躯干和下肢引出DTR的技术以及这些反射的解读。
