The origin at the scapula and the insertion into the radius of the biceps brachii means it can act on both the shoulder joint and the elbow joint, which is why this muscle participates in a few movements of the arm. It derives its name from its two heads which merge in one unique di...
Each chart groups the muscles of that region into its component groups, making your revision a million times easier. For example, upper limb muscles are grouped by shoulder and arm, forearm and hand. Next to each muscle, you’ll find its origin(s), insertion(s), innervation(s) and functi...
Action:Ankle plantarflexion Origin:Posterior surfaces of the tibia and fibula, and fibrous arch Insertion:Posterior surface of the calcaneus (heel bone) via the Achilles tendon Nerve Supply:Tibial Nerve (S1, S2) Functions:Standing on tiptoes, stops the body falling forwards when standing and aids...
Trigeminal 21 Medial pterygoid INSERTION medial surface of medial surface of lateral pterygoid plate mandible near its of sphenoid bone, angle maxilla palatine bone greater wing lateral condyle of mandible pterygoid plate of and capsule of temsphenoid bone poromandibular joint ORIGIN INSERTION internal su...
Trunk muscles may be categorized into local and global muscles. The local muscle system includes deep muscles, and portions of some muscles that have their origin or insertion on the vertebrae. These local muscles control the stiffness and intervertebral relationship of the spinal segments. They prov...
Gastrocnemius Origin: Medial and lateral femoral condyles, knee joint capsule and oblique popliteal ligament Gastrocnemius Insertion: Posterior surface of the calcaneus via the tendocalcaneus (aka Achilles tendon) Nerve Supply: Tibial Nerve (S1, S2) AKA: Gastroc, calf muscleGastrocnemius...