Superficial muscle originating from femur condyles above knee. Forms Achilles tendon connecting to calcaneus. Functions as powerful plantar flexor and knee flexor. Enables explosive movements for running and jumping. Maintains posture and balance by stabilizing ankle and knee
Pelvis connects legs to upper body and supports spine health. About 70% of western industrialized nations have slight pelvic tilt. Most common cause is leg length difference of 3-9 millimeters
Aneurysmal bone cyst presents as painful expansile lesion in young patients. Adamantinoma is rare low-grade malignant lesion in tibia's anterior cortex. Bone infarction shows serpentiginous border in diaphysis/metaphysis. Chondroblastoma presents with extensive edema in young patients. Chondromyxoid fibroma is rare benign lesion in tibia metaphysis
Radius and ulna are two long bones running parallel in forearm. Both bones attach to around 20 forearm muscles. Radius is shorter and smaller than ulna
Chin-up is a bodyweight exercise using underhand grip to pull up from bar. Different from pull-up, which uses overhand grip. Primary muscles worked are biceps and back muscles
Large triangular muscle located on medial side of thigh. Composed of pubofemoral (adductor) and ischiocondylar (hamstring) portions. Innervated by obturator nerve for adductor portion and sciatic nerve for hamstring portion. Contains osseoaponeurotic openings for profunda femoris artery passage