15/12/2025
𝗢𝘃𝗲𝗿𝘃𝗶𝗲𝘄 𝗼𝗳 𝗦𝗶𝗴𝗻𝘀 𝗶𝗻𝗱𝗶𝗰𝗮𝘁𝗶𝗻𝗴 𝗣𝘆𝗿𝗮𝗺𝗶𝗱𝗮𝗹 𝗧𝗿𝗮𝗰𝘁 𝗟𝗲𝘀𝗶𝗼𝗻𝘀 – Part 1
Pyramidal signs refer to a set of neurological symptoms that indicate damage or dysfunction in the pyramidal tract of the brain or spinal cord. These signs include weakness, spasticity, hyperreflexia, and various clinical signs (https://www.routledge.com/Hankeys-Clinical-Neurology/Gorelick-Testai-Hankey-Wardlaw/p/book/9780367280321).
✅ 𝗮. 𝗕𝗮𝗯𝗶𝗻𝘀𝗸𝗶 𝘀𝗶𝗴𝗻
The Babinski sign or extensor plantar response was first described in 1896 by the French neurologist of Polish ancestry Joseph F.F. Babinski to indicate the presence of pyramidal tract dysfunction (PTD, https://pubmed.ncbi.nlm.nih.gov/24906707/). The Babinski sign is elicited by firmly stroking the lateral border of the sole from heel to the base of the toes and then medially across the ball of the foot. A pathological response consists of dorsiflexion (extension) of the great toe combined with fanning and extension of the other toes. It indicates corticospinal tract dysfunction. Compared with the reference standard, the Babinski sign had low sensitivity (50.8%, 95%CI 41.5–60.1) but high specificity (99%, 95%CI 97.7–100) in identifying PTD with a positive likelihood ratioof 51.8 (95%CI 16.6–161.2). When present, it seems to be a highly accurate “rule-in” finding (https://pubmed.ncbi.nlm.nih.gov/24906707/).
✅ 𝗯. 𝗢𝗽𝗽𝗲𝗻𝗵𝗲𝗶𝗺 𝘀𝗶𝗴𝗻
The Oppenheim sign is obtained by applying firm downward pressure with the examiner’s thumb and index finger along the anterior surface of the tibia (https://karger.com/mng/article-abstract/12/6/518/198234/Zur-Pathologie-der-Hautreflexe-an-den-unteren?redirectedFrom=fulltext). A positive (pathological) response is extension of the great toe, often accompanied by spreading of the other toes, reflecting impaired corticospinal inhibition. Araújo et al. describe a positive predictive value of 61,3% (https://pubmed.ncbi.nlm.nih.gov/29443235/).
✅ 𝗰. 𝗚𝗼𝗿𝗱𝗼𝗻 𝘀𝗶𝗴𝗻
The Gordon sign is provoked by firmly squeezing the calf muscles (https://pubmed.ncbi.nlm.nih.gov/18637037/). In patients with corticospinal tract lesions, this maneuver produces extension of the great toe, sometimes with fanning of the lesser toes, analogous to the Babinski response. The Gordon sign was given a fair rating for inter-observer consistency with a kappa of 0.3515 (95% CI = 0.255-0.448) and the highest intra-observer consistency with a kappa of 0.673 among the Babinski reflex and its variants (https://pubmed.ncbi.nlm.nih.gov/18637037/). No studies have determined its clinical validity (https://www.ncbi.nlm.nih.gov/books/NBK513343/).
✅ 𝗱. 𝗥𝗼𝘀𝘀𝗼𝗹𝗶𝗺𝗼 𝘀𝗶𝗴𝗻
Grigorii Ivanovich Rossolimo (1860–1928) was a Russian neurologist, who published his observations of increased flexion of the toes in 1902 (https://pubmed.ncbi.nlm.nih.gov/15642914/).The Rossolimo sign is elicited by tapping the plantar surfaces of the distal phalanges of the toes. A pathological response consists of brisk flexion of the toes. It is considered a sign of pyramidal tract involvement affecting the lower limb. The Rossolimo sigs has a high diagnostic sensitivity for neurological examination of cervical and thoracic spondylotic myelopathy patients (https://pubmed.ncbi.nlm.nih.gov/20625382/).
✅ 𝗲. 𝗧𝗿ö𝗺𝗻𝗲𝗿 𝘀𝗶𝗴𝗻
The Trömner sign is evoked by tapping the palmar surface of the distal phalanx of the middle or ring finger. A positive response is flexion of the terminal phalanx and sometimes opposition of the thumb. It reflects heightened excitability of finger flexor reflex pathways due to corticospinal tract dysfunction (https://pmc.ncbi.nlm.nih.gov/articles/PMC3099157/).
High sensitivity (94%) and relatively high negative predictive value (85%) for Trömner sign in one study indicate the usefulness in ruling out cervical spondylotic myelopathy. High incidence of positive Trömner sign in presymptomatic cervical cord compression patients suggests it could have a useful role in early detection of presymptomatic patients (https://pubmed.ncbi.nlm.nih.gov/27404855/).
Note: Mild bilateral Trömner responses may occur in physiologically hyperexcitable individuals; the sign is considered pathological when clearly asymmetric or exaggerated.
✅ 𝗳. 𝗛𝗼𝗳𝗳𝗺𝗮𝗻𝗻 𝘀𝗶𝗴𝗻
The Hoffmann sign is produced by flicking the distal phalanx of the middle or ring finger downward, allowing it to rebound. A pathological response is reflex flexion and adduction of the thumb and/or flexion of the index finger. It suggests corticospinal tract hyperexcitability. A systematic review of the utility of the Hoffmann sign for the diagnosis of degenerative cervical myelopathy (DCM) indicated that the Hoffman sign has a positive likelihood ratio of 2.2 (95% CI 1.5-3.3) and a negative likelihood ratio of 0.63 (95% CI 0.5-0.8), documenting insufficient data to support use of the Hoffman sign alone to confirm or refute a diagnosis of DCM.
Note: As with the Trömner sign, a subtle bilateral Hoffmann response may occur in healthy subjects; unilateral or markedly pronounced responses are more indicative of pathology.
📷 Illustration: https://link.springer.com/chapter/10.1007/978-3-540-69091-7_11