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Sign Of Spinal Cord Compression

Hoffmann's_sign

A Hoffmann (or Tinel's sign or Patel's sign) is a tingling sensation triggered by a mechanical stimulus in the distal part of an injured nerve. This sensation radiates peripherally, from the point where it is triggered to the cutaneous distribution of the nerve. The tingling response can be compared with that produced by a weak electric current, as in transcutaneous electrical nerve stimulation (TENS). This unpleasant sensation is not a severe pain and does not persist.^[5]

^{Lhermitte's_sign}

Lhermitte's phenomenon or the Lhermitte phenomenon (/lɛərˈmiːt/), sometimes called the barber chair phenomenon, is an electrical sensation that runs down the back and into the limbs. The sensation can feel like it goes up or down the spine. It is generally considered uncomfortable. In many patients, it is elicited by bending the head forward.^[1] It can also be evoked when a practitioner pounds on the posterior cervical spine while the neck is flexed; this is caused by involvement of the posterior columns. It is sometimes called Lhermitte's sign, though this is technically incorrect as a sign is something that can be observed on examination whereas a symptom is the subjective experience. Lhermitte's phenomenon is subjective and therefore a symptom. Lhermitte's phenomenon is named for French neurologist Jean Lhermitte.

inverted radial reflex → flexion of the fingers without flexion of the forearm, on tapping the lower end of the radius; regarded as indicating a lesion of the fifth cervical segment of the spinal cord.