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Muscle Anatomy Basics
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Triceps Brachii
Location: Back of the upper arm. Function: Extension of the elbow.
Tibialis Anterior
Location: Front of the shin. Function: Dorsiflexion and inversion of the foot.
Quadriceps Femoris
Location: Front of the thigh. Function: Knee extension and hip flexion.
Sartorius
Location: Runs across the thigh from the outside to the inside. Function: Flexion, abduction, and lateral rotation of the hip.
Biceps Brachii
Location: Front of the upper arm. Function: Flexion of the elbow and supination of the forearm.
Latissimus Dorsi
Location: Back. Function: Extension, adduction, and medial rotation of the arm.
Soleus
Location: Calf, beneath the gastrocnemius. Function: Plantar flexion of the foot.
Pectoralis Major
Location: Chest. Function: Adduction and medial rotation of the arm.
Rectus Abdominis
Location: Front of the abdomen. Function: Flexion of the lumbar spine.
Supinator
Location: Forearm. Function: Supination of the forearm.
Pronator Teres
Location: Forearm. Function: Pronation of the forearm.
Vastus Medialis
Location: Inner part of the thigh. Function: Knee extension.
Vastus Intermedius
Location: Front and side of the thigh. Function: Knee extension.
Deltoid
Location: Shoulder. Function: Arm abduction, flexion, and extension.
Gluteus Maximus
Location: Buttock. Function: Hip extension, lateral rotation, and abduction.
Rectus Femoris
Location: Middle of the thigh. Function: Knee extension and hip flexion.
Adductor Longus
Location: Inner thigh. Function: Adduction of the thigh.
Splenius Capitis
Location: Back of the neck. Function: Extension and rotation of the head.
Trapezius
Location: Upper back and neck. Function: Elevation, retraction, and rotation of the scapula.
Brachioradialis
Location: Forearm. Function: Flexion of the elbow.
Gastrocnemius
Location: Calf. Function: Plantar flexion of the foot and flexion of the knee.
Erector Spinae
Location: Running along the spine. Function: Extension and lateral flexion of the spine.
Hamstrings
Location: Back of the thigh. Function: Knee flexion and hip extension.
Gracilis
Location: Inner thigh. Function: Adduction of the hip and flexion of the knee.
Psoas Major
Location: Lower spine and pelvis. Function: Flexion and external rotation of the hip.
Iliacus
Location: Pelvis. Function: Hip flexion.
Rhomboid Major
Location: Upper back. Function: Retraction of the scapula.
External Oblique
Location: Sides of the abdomen. Function: Torsion of the spine and compression of the abdominal cavity.
Sternocleidomastoid
Location: Front of the neck. Function: Flexion and rotation of the head.
Vastus Lateralis
Location: Side of the thigh. Function: Knee extension.
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