Y1: Muscles Flashcards
Action
Sternocleidomastoid
Unilateral: ipsilateral rotation and contralateral flexion of head and neck. Bilateral: flexion of neck
Action
Trapezius
Upper fibers: elevates and upwardly rotates scapula. Middle fibers: retract scapula. Lower fibers: depresses and upwardly rotates scapula
Action
Levator scapulae
Elevates and downwardly rotates scapula, helps extend neck
Action
Splenius capitis
Unilateral: ipsilateral rotation and lateral flexion of head and neck. Bilateral: extension of head and neck
Action
Longus colli
Flexes and laterally flexes neck
Action
Diaphragm
Increases volume of thoracic cavity by flattening and descending, allowing for inspiration
Action
Intercostal muscles
External intercostals: elevates ribs during inspiration. Internal intercostals: depresses ribs during forced expiration
Action
Pectoralis major
Flexes, adducts, and medially rotates arm
Action
Pectoralis minor
Depresses and protracts scapula, elevates ribs during forced inspiration
Action
Serratus anterior
Protracts and rotates scapula upward, stabilizes scapula against chest wall
Action
Quadriceps femoris
Extends knee joint
Action
Adductor muscles
Adducts
Action
Trapezius
Elevates, retracts, depresses, and rotates scapula, extends neck
Action
Latissimus dorsi
Adducts, extends, and internally rotates arm
Action
Rhomboids
Retracts and elevates scapula, rotates scapula downward
Action
Erector spinae
Extends and laterally flexes vertebral column, controls spinal posture
Action
Rectus abdominis
Flexes trunk, compresses abdominal contents
Action
External oblique
Compresses abdominal contents, flexes and rotates trunk
Action
Internal oblique
Compresses abdominal contents, flexes and rotates trunk
Action
Transversus abdominis
Compresses abdominal contents
Action
Deltoid
Abducts arm at shoulder joint, helps flex and extend arm
Action
Biceps brachii
Flexes elbow joint, supinates forearm, and helps flex shoulder joint
Action
Triceps brachii
Extends elbow joint, helps extend and adduct arm
Action
Brachialis
Flexes elbow joint
Action
Brachioradialis
Flexes elbow joint when forearm is in mid-pronation or supination
Action
Flexor carpi radialis
Flexes wrist joint and abducts hand
Action
Flexor carpi ulnaris
Flexes wrist joint and adducts hand
Action
Extensor carpi radialis
Extends wrist joint and abducts hand
Action
Extensor carpi ulnaris
Extends wrist joint and adducts hand
Action
Gluteus maximus
Extends thigh at hip joint
Action
Quadriceps femoris
Extends knee joint and helps flex hip joint
Action
Hamstrings
Flexes knee joint and extends hip joint
Action
Gastrocnemius
Plantar flexes foot at ankle joint
Action
Soleus
Plantar flexes foot at ankle joint
Action
Tibialis anterior
Dorsiflexes foot at ankle joint and inverts foot
Action
Peroneus longus
Plantar flexes foot at ankle joint and everts foot
Action
Extensor digitorum longus
Extends toes 2-5 and dorsiflexes foot at ankle joint
Action
Flexor digitorum longus
Flexes toes 2-5 and plantar flexes foot at ankle joint
Action
Deltoid
Abducts arm at shoulder joint, helps flex and extend arm
Action
Biceps brachii
Flexes elbow joint, supinates forearm, and helps flex shoulder joint
Action
Triceps brachii
Extends elbow joint, helps extend and adduct arm
Action
Brachialis
Flexes elbow joint
Action
Brachioradialis
Flexes elbow joint when forearm is in mid-pronation or supination
Action
Flexor carpi radialis
Flexes wrist joint and abducts hand
Action
Flexor carpi ulnaris
Flexes wrist joint and adducts hand
Action
Extensor carpi radialis
Extends wrist joint and abducts hand
Action
Extensor carpi ulnaris
Extends wrist joint and adducts hand
Compartment
Biceps brachii
Anterior compartment of arm
Compartment
Triceps brachii
Posterior compartment of arm
Compartment
Brachialis
Anterior compartment of arm
Compartment
Brachioradialis
Anterior compartment of forearm
Compartment
Flexor carpi radialis
Anterior compartment of forearm
Compartment
Flexor carpi ulnaris
Anterior compartment of forearm
Compartment
Flexor digitorum profundus
Anterior compartment of forearm
Compartment
Flexor digitorum superficialis
Anterior compartment of forearm
Compartment
Flexor pollicis longus
Anterior compartment of forearm
Compartment
Pronator teres
Anterior compartment of forearm
Compartment
Extensor carpi radialis brevis
Posterior compartment of forearm
Compartment
Extensor carpi radialis longus
Posterior compartment of forearm
Compartment
Extensor carpi ulnaris
Posterior compartment of forearm
Compartment
Extensor digitorum
Posterior compartment of forearm
Compartment
Extensor digiti minimi
Posterior compartment of forearm
Compartment
Extensor indicis
Posterior compartment of forearm
Compartment
Supinator
Posterior compartment of forearm
Compartment
Abductor pollicis brevis
Thenar compartment of hand
Compartment
Adductor pollicis
Hypothenar compartment of hand
Compartment
Opponens pollicis
Thenar compartment of hand
Compartment
Palmaris brevis
Hypothenar compartment of hand
Compartment
Flexor pollicis brevis
Thenar compartment of hand
Compartment
Lumbricals
Palmar interosseous compartment and dorsal interosseous compartment of hand
Compartment
Quadriceps femoris
Anterior compartment of thigh
Compartment
Sartorius
Anterior compartment of thigh
Compartment
Hamstrings
Posterior compartment of thigh
Compartment
Adductors
Medial compartment of thigh
Compartment
Gluteus maximus
Gluteal compartment
Compartment
Gluteus medius
Gluteal compartment
Compartment
Gluteus minimus
Gluteal compartment
Compartment
Iliopsoas
Iliopsoas compartment
Compartment
Piriformis
Pelvic compartment
Compartment
Obturator internus
Pelvic compartment
Compartment
Levator ani
Pelvic compartment
Compartment
Coccygeus
Pelvic compartment
Compartment
Rectus abdominis
Anterior compartment of abdomen
Compartment
External oblique
Anterolateral compartment of abdomen
Compartment
Internal oblique
Posterolateral compartment of abdomen
Compartment
Transversus abdominis
Deepest layer of lateral abdominal muscles
Compartment
Pectoralis major
Anterior compartment of thorax
Compartment
Pectoralis minor
Anterior compartment of thorax
Compartment
Intercostal muscles
Thoracic compartment
Compartment
Diaphragm
Thoracic compartment
Compartment
Sternocleidomastoid
Anterior compartment of neck
Compartment
Trapezius
Posterior compartment of neck
Compartment
Levator scapulae
Posterior compartment of neck
Compartment
Splenius capitis
Posterior compartment of neck
Compartment
Longus colli
Anterior compartment of neck
Shape
Sternocleidomastoid
Bifurcated bipennate
Shape
Trapezius
Triangular multipennate
Shape
Levator scapulae
Fan-shaped multipennate
Shape
Splenius capitis
Broad flat bipennate
Shape
Longus colli
Strap-shaped
Shape
Diaphragm
Dome-shaped
Shape
Intercostal muscles
External intercostals: superficial layer of multipennate fibers. Internal intercostals: deep layer of multipennate fibers
Shape
Pectoralis major
Convergent
Shape
Pectoralis minor
Triangular
Shape
Serratus anterior
Multipennate
Shape
Quadriceps femoris
Multipennate
Shape
Hamstrings
Biceps femoris: flexes knee joint, laterally rotates leg. Semitendinosus and semimembranosus: flex knee joint, extend hip joint, medially rotate leg
Shape
Adductor muscles
Convergent
Shape
Trapezius
Triangular, Multipennate
Shape
Latissimus dorsi
Multipennate
Shape
Rhomboids
Quadrilateral
Shape
Erector spinae
Multipennate
Shape
Rectus abdominis
Strap-like, Fusiform
Shape
External oblique
Convergent, Fusiform