Tibial Nerve Size and Clinical Features in Chronic Plantar Fasciitis

1. Chronic Plantar Fasciitis Group: Inclusion Criteria: * Be between the ages of 18-65 * Have heel pain that has been ongoing for at least 6 months, especially noticeable during the first few steps after getting up in the morning * Have tenderness upon palpation of the medial calcaneal tubercle * Have read and signed the volunteer consent form (VCF) Exclusion Criteria: * Being under 18 or over 65 years old * Having a history of physical therapy, injection, radiation, or surgery targeting the plantar fascia or tibial nerve within the last 6 months * Calcaneus fracture, tumour, or cyst related to the plantar fascia * Lumbosacral radiculopathy, polyneuropathy * Rheumatic diseases such as rheumatoid arthritis, ankylosing spondylitis, gout * Foot and ankle osteoarthritis * Presence of osteomyelitis or skin infection in the foot * Systemic diseases such as kidney and liver failure, diabetes, peripheral arterial vascular disease * Pregnancy 2. Healty-control-group Inclusion Criteria: * Being completely healthy * Being between 18 - 65 years old * Having read and signed the Volunteer Consent Form (BGOF) Exclusion Criteria: * Being under 18 or over 65 years old * Having any acute or chronic disease * Pregnancy