Investigation of the Effects of Interlaminar Epidural Steroid Injection on Upper Extremity Proprioception in Patients With Chronic Cervical Radiculopathy

Inclusion Criteria: Participants must meet all of the following: * Female or male, 18-65 years of age * Presence of unilateral cervical radicular pain lasting at least 3 months * MRI of the cervical spine within the last 12 months demonstrating at least one cervical disc herniation consistent with the patient's symptoms * Diagnosed with chronic cervical radiculopathy based on history, physical examination, and clinical evaluation * Ability to read and write (literacy) * Willingness to participate and ability to provide written informed consent Exclusion Criteria: Participants will be excluded for any of the following: * Cervical physical therapy or cervical spinal injection performed within the past 6 months * Symptoms or diagnosis of upper extremity entrapment neuropathy * Documented vitamin B12 deficiency or vitamin D deficiency on laboratory results within the past year * History of cervical spine surgery or significant cervical trauma * Bilateral cervical radicular pain * Cervical spinal stenosis * History of upper extremity surgery or significant upper extremity trauma * Cognitive impairment, major psychiatric disorder, intellectual disability, or history of significant neurological disease * Diagnosis of polyneuropathy * Diagnosis of Diabetes Mellitus * Diagnosis of fibromyalgia * Current use of medications that may impair proprioception or have sedative effects (e.g., gabapentinoids, antidepressants, muscle relaxants) * Active local or systemic infection * Coagulopathy or bleeding diathesis * Known allergy to any components of the planned injection (triamcinolone, lidocaine, saline, contrast medium) * Pregnancy * Inability or unwillingness to provide informed consent * Illiteracy (unable to read or write) Withdrawal Criteria * Voluntary withdrawal of consent at any time * Inability or unwillingness to continue study participation for any reason * New medical condition or event after enrollment that renders continuation unsafe according to the investigator's judgment