Muscular System Flashcards
Anterior Tibialis & Posterior Tibialis
Accelerates dorsiflexion and inversion of the foot
Soleus
Accelerates plantarflexion
Gastrocnemius
Accelerates plantarflexion
Peroneus Longus
Plantarflexes and everts the foot
Biceps Femoris - Long Head
accelerates knee flexion and hip extension
Biceps Femoris - Short Head
Accelerates knee flexion and tibial external rotation
Semimembranosus & Semitendinosus
Accelerates knee flexion, hip extension, and tibial internal rotation
Vastus Lateralis & Vastus Medialis & Vastus Intermedius
Accelerates knee extension
Rectus Femoris
Accelerates knee extension and hip flexion
Adductor Longus & Adductor Magnus – Anterior Fibers
Accelerates hip adduction, flexion, and internal rotation
Adductor Magnus – Posterior Fibers
Accelerates hip adduction, extension, and external rotation
Adductor Brevis
Accelerates hip adduction. flexion, and internal rotation
Gracilis
Accelerates hip adduction, flexion, and internal rotation
Assists in tibial internal rotation
Pectineus
Accelerates hid adduction, flexion, and internal rotation
Gluteus Medius
Accelerates hip abduction and internal rotation (anterior fibers)
Accelerates hip abduction and external rotation (posterior fibers)
Gluteus Minimus
Accelerates hip abduction and internal rotation
Gluteus Maximus
Accelerates hip extension and external rotation
Tensor Fascia Latae (including the IT band)
Accelerates hip flexion, abduction, and internal rotation
Psoas
Accelerates hip flexion and external rotation
Extends and rotates lumbar spine
Iliacus
accelerates hip flexion and external rotation
Sartorius
Accelerates hip flexion, external rotation, and abduction
Accelerates knee flexion and internal rotation
Piriformis
Accelerates hip external rotation, abduction, and extension
Rectus Abdominis
Accelerates spinal flexion, lateral flexion, and rotation
External Oblique
Accelerates spinal flexion, lateral flexion, and contralateral rotation
Internal Oblique
Accelerates spinal flexion, lateral flexion, and ispilateral rotation
Transverse Abdominis
Increases intra-abdominal pressure
Supports the abdominal vescera
Diaphram
Pulls the central tendon inferiorly, increasing the volume in the thoracic cavity
Superficial Erector Spinae: Iliocostalis, longissmus, and spinalis
Accelerates spinal extension, rotation, and lateral flexion
Quadratus Lumborum
Spinal lateral flexion
Multifidus
Accelerates spinal extension and contralateral
Latissimus Dorsi
accelerates shoulder extension, adduction, and internal rotation
Serratus Anterior
Accelerates scapular retraction
Rhomboid Major
Produces scapular retraction and downward rotation
Rhomboid Minor
Produces scapular retraction and downward rotation
Lower Trapezius
Accelerates scapular depression
Middle Trapezius
Accelerates scapular retraction
Upper Trapezius
Accelerates cervical extension, lateral flexion, and rotation
Accelerates scapular elevation
Pectoralis Major
Accelerates shoulder flexion (clavicular fibers), horizontal adduction, and internal rotation
Pectoralis Minor
Protracts the scapula
Anterior Deltoid
Accelerates shoulder flexion and internal rotation
Medial Deltoid
Accelerates shoulder abduction
Posterior Deltoid
Accelerates shoulder extension and external rotation
Teres Major
Accelerates shoulder internal rotation, adduction, and extension
Teres Minor
Accelerates shoulder external rotation
Infraspinatus
accelerates shoulder external rotation
Subscapularis
accelerates shoulder internal rotation
Supraspinatus
Accelerates abduction of the arm
Biceps Brachii
Accelerates elbow flexion, supination, of the radioulnar joint, and shoulder flexion
Triceps Brachii
Accelerates elbow extension and shoulder extension
Brachioradialis
Accelerates elbow flexion
Brachialis
Accelerates elbow flexion
Levator Scapulae
Accelerates cervical extension, lateral flexion, and ipsilateral rotation when the scapulae is anchored
Assists in elevation and downward rotation of the scapulae
Sternocleidomastoid
Accelerates cervical flexion, rotation, and lateral flexion
Scalenes
Accelerates cervical flexion, rotation, and lateral flexion
Assists rib elevation during inhalation
Longus Coli
Accelerates cervical flexion, lateral flexion, and ipsilateral rotation
Longus Capitis
Accelerates cervical flexion and lateral flexion