After the tap of a hammer, the leg is normally extended once and comes to rest. The absence or decrease of this reflex is problematic, and known as Westphal's sign. This reflex may be diminished or absent in lower motor neuron lesions and during sleep. On the other hand, multiple oscillation of the leg (pendular reflex) following the tap may be a sign of cerebellar diseases. Exaggerated (brisk) deep tendon reflexes such as this can be found in upper motor neuron lesions, hyperthyroidism, anxiety or nervousness. The test itself assesses the nervous tissue between and including the L2 and L4 segments of the spinal cord. The<unk>  is often tested in infants to test the nervous system.
Patellar reflex
Ankle jerk reflex
Plantar reflex
Glabellar reflex
Extensor digitorum reflex
Biceps reflex
Brachioradialis reflex
Jaw jerk reflex