06/03/2025
➡️ EXTERNAL OBLIQUE
✅ ORIGIN: Outer surface of the 5th to the 12th ribs
✅ INSERTION: Linea alba; The p***c crest and tubercle; The anterior superior iliac spine and iliac crest
💪🏼 ACTION: Rotates vertebral column to the opposite side and bends trunk to the same side (unilateral); Aids expiration by compressing and depressing the lower thoracic cavity, weakly assists in flexion of the trunk and helps maintain abdominal tone (bilateral)
☑️ NERVE SUPPLY: Lower intercostal nerves; Subcostal nerve
07/17/2024
➡️ EXTENSOR HALLUCIS BREVIS
✅ ORIGIN: Superolateral surface of the calcaneus
✅ INSERTION: Dorsum of the base of the proximal phalanx and dorsal aponeurosis of the hallux
💪🏼 ACTION: Extensor of the metatarsophalangeal joint of the hallux
☑️ NERVE SUPPLY: Muscular branch of deep fibular nerve (L5, S1)
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04/08/2024
➡️ TIBIALIS ANTERIOR
✅ ORIGIN: Lateral proximal tibia; The tibial condyle; The interosseous membrane; The superficial crural fascia
✅ INSERTION: Medial surface of the medial cuneiform bone and the 1st metatarsal bone
💪🏼 ACTION: Dorsal flexion of the talocrural joint and inversion of the subtalar joint
☑️ NERVE SUPPLY: Deep fibular nerve (L4, L5)
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10/08/2023
➡️ TERES MAJOR
✅ ORIGIN: Posterior aspect of inferior angle of scapula
✅ INSERTION: Crest of lesser tubercle of humerus
💪🏼 ACTION: Adducts and medially rotates arm at glenohumeral joint
☑️ NERVE SUPPLY: Lower subscapular nerve (C5-C7)
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