| Muscle
| Innervation
| Action
|
| | |
| Anterior Thigh
| | |
| Quadriceps Femoris:
| Femoral (L2-4)
| Extends Leg
|
| Rectus Femoris
| | |
| Vastus Medialis
| | |
| Vastus Lateralis
| | |
| Vastus Intermedius
| | |
| Articularis Genu
| Femoral
| |
| Sartorius
| Femoral
| "Flexes, Abducts, and Laterally Rotates Thigh"
|
| | Flexes and Medially Rotates Leg at Knee
|
| | |
| Medial Thigh
| | |
| Pectineus
| Femoral and Obturator
| "Flexes, adducts, medially rotates hip joint"
|
| Adductor longus
| Obturator (L2-4)
| Adducts thigh and flexes hip joint
|
| Adductor brevis
| Obturator
| Adducts thigh and flexes hip joint
|
| Gracilis
| Obturator
| Adducts thigh and flexes knee joint
|
| Adductor magnus
| Obturator
| Adducts thigh; Flexes and Extends Hip Joint
|
| | |
| Posterior Thigh
| | |
| Biceps Femoris
| Sciatic
| flexes leg and long head also extends thigh
|
| Semitendinosus
| Sciatic
| flexes leg and extends thigh
|
| Semimembranosus
| Sciatic
| flexes leg and extends thigh
|
| | |
| Gluteal Region
| | |
| Gluteus Maximus
| Inferior Gluteal (L5-S2)
| extends and laterally rotates thight
|
| Gluteus Medius
| Superior Gluteal (L4-S1)
| abducts and medially rotates thigh
|
| Gluteus Minimus
| Superior Gluteal (L4-S1)
| abducts and medially rotates thigh
|
| Tensor Fasciae Latae
| Superior Gluteal (L4-S1)
| tenses iliotibial tract
|
| Piriformis
| "Nerve to Piriformis (S1,S2)"
| laterally rotates thigh
|
| Superior/Inferior Gemellus
| "Nerve to Obturator Internus (L5,S1)"
| laterally rotates thigh
|
| Quadratus Femoris
| "Nerve to Quadratus Femoris (L5,S1)"
| laterally rotates thigh
|
| Muscle
| Innervation
| Action
|
| | |
| Anterior Leg
| | |
| Tibialis Anterior
| "Deep Fibular (L4,L5)"
| dorsiflexes and inverts foot
|
| Extensor Hallicus Longus
| "Deep Fibular (L4,L5)"
| extends big toe
|
| Extensor Digitorum Longus
| "Deep Fibular (L4,L5)"
| extends toes 2-5
|
| Fibularis Tertius
| "Deep Fibular (L4,L5)"
| dorsiflexes and everts foot
|
| | |
| Lateral Leg
| | |
| Fibularis Longus
| Superficial Fibular
| everts foot
|
| Fibularis Brevis
| Superficial Fibular
| everts foot
|
| | |
| Posterior Leg
| | |
| (Superficial)
| | |
| Gastrocnemius
| "Tibial Nerve (S1,S2)"
| plantarflexes foot and flexes knee if foot not fixed
|
| Soleus
| "Tibial Nerve (S1,S2)"
| plantarflexes foot
|
| Plantaris
| "Tibial Nerve (S1,S2)"
| assists in plantarflexion
|
| (Deep)
| | |
| Popliteus
| Tibial Nerve
| internally rotates tibia on femur (unlocks knee)
|
| Tibialis Posterior
| Tibial Nerve
| plantarflexes and adducts foot
|
| Flexor Hallucis Longus
| Tibial Nerve
| flexes big toe
|
| Flexor Digitorum Longus
| Tibial Nerve
| flexes toes 2-5
|
| | |
| Dorsum of Foot
| | |
| Externsor Hallucis Brevis
| Deep Fibular
| helps extend big toe
|
| Externor Digitorum Brevis
| Deep Fibular
| helps extend toes 2-5
|
| | |
| Sole of Foot
| | |
| (1st layer)
| | |
| Abductor Hallucis
| Medial Plantar Nerve
| abducts and flexes big toe
|
| Flexor Digitorum Brevis
| Medial Plantar Nerve
| flexes toes 2-5
|
| Abductor Digiti Minimi
| Lateral Plantar Nerve
| abducts and flexes little toe
|
| Muscle
| Innervation
| Action
|
| | |
| (2nd layer)
| | |
| Quadratus Plantae
| Lateral Plantar Nerve
| helps flex toes
|
| 1st Lumbrical
| Medial Plantar Nerve
| flexes proximal phalanx and
|
| "2,3,4 Lumbricals"
| Lateral Plantar Nerve
| extends two distal phalanges
|
| (3rd layer)
| | |
| Flexor Hallucis Brevis
| Medial Plantar Nerve
| flexes big toe
|
| Flexor Digiti Minimi
| Lateral Plantar Nerve
| flexes little toe
|
| Adductor Hallucis
| Lateral Plantar Nerve
| adducts big toe
|
| (4th layer)
| | |
| Interossei
| Lateral Plantar Nerve
| dorsal (4) abduct; plantar (3) adduct
|
| | |
| Shoulder and Back
| | |
| Deltoid
| Axillary Nerve
| "abducts, flexes, and extends arm"
|
| Teres Major
| "Lower Subscapular Nerve (C5,C6)"
| adducts and medially rotates arm
|
| Rotator Cuff:
| | |
| Supraspinatus
| Suprascapular Nerve
| initiates abduction
|
| Infraspinatus
| Suprascapular Nerve
| laterally rotates arm
|
| Teres Minor
| Axillary Nerve
| laterally rotates arm
|
| Subscapularis
| Upper and Lower Subscapular Nerves
| medially rotates arm
|
| Trapezius
| Spinal Accessory Nerve (CN XI)
| "elevates, retracts, and depresses scapula"
|
| Rhomboids
| Dorsal Scapular
| retracts scapula
|
| Levator Scapulae
| Dorsal Scapular
| elevates scapula
|
| Latissimus Dorsi
| Thoracodorsal
| "extends, adducts, and medially rotates arm"
|
| Serratus Anterior
| Long Thoracic
| protracts scapula and holds it to thoracic wall
|
| | |
| Flexors of Arm
| | |
| Biceps Brachii
| Musculocutaneous
| flexes and supinates forearm
|
| Brachialis
| Musculocutaneous
| flexes forearm
|
| Coracobrachialis
| Musculocutaneous
| flexes and adducts arm
|
| | |
| Muscle
| Innervation
| Action
|
| | |
| Extensors of Arm
| | |
| Triceps Brachii
| Radial Nerve
| extends forearm
|
| | |
| Flexors of Forearm
| | |
| (Superficial)
| | |
| Flexor Carpi Ulnaris
| Ulnar Nerve
| flexes and adducts hand
|
| Palmaris Longus
| Median Nerve
| flexes hand and tenses plantar aponeurosis
|
| Flexor Carpi Radialis
| Median Nerve
| flexes and abducts hand
|
| Pronator Teres
| Median Nerve
| pronates and flexes forearm
|
| Flexor Digitorum Superficialis
| Median Nerve
| flexes fingers and wrist
|
| (Deep)
| | |
| Flexor Digitorum Profundus
| Median and Ulnar
| flexes fingers and wrist
|
| Flexor Pollicis Longus
| Median Nerve
| flexes thumb
|
| Pronator Quadratus
| Median Nerve
| pronates forearm
|
| | |
| Extensors of Forearm
| | |
| (Superficial Layer)
| | |
| Brachioradialis
| deep radial nerve
| flexes forearm (handshake muscle)
|
| Extensor Carpi Radialis Longus
| deep radial nerve
| extends and abducts hand
|
| Extensor Carpi Radialis Brevis
| deep radial nerve
| extends and abducts hand
|
| Extensor Digitorum
| posterior interosseus
| extends fingers
|
| Extensor Digiti Minimi
| posterior interosseus
| extends little finger
|
| Extensor Carpi Ulnaris
| posterior interosseus
| extends and adducts hand
|
| (Deep Layer)
| | |
| Supinator
| posterior interosseus
| supinates forearm
|
| Extensor Pollicis Longus
| posterior interosseus
| extends thumb
|
| Extensor Pollicis Brevis
| posterior interosseus
| extends thumb at metacarpophalangeal joint
|
| Abductor Pollicis Longus
| posterior interosseus
| abducts thumb
|
| Extensor Indicis
| posterior interosseus
| extends index finger
|
| | |
| Muscle
| Innervation
| Action
|
| | |
| Hand
| | |
| (Thenar Compartment)
| | |
| Abductor Pollicis Brevis
| Recurrent Branch of Median Nerve
| abducts thumb
|
| Opponens Pollicis
| Recurrent Branch of Median Nerve
| |
| Flexor Pollicis Brevis
| Recurrent Branch of Median Nerve
| |
| Adductor Pollicis
| Ulnar
| |
| (Hypothenar Compartment)
| | |
| Abductor Digiti Minimi
| Ulnar Nerve
| abducts little finger
|
| Opponens Digiti Minimi
| Ulnar Nerve
| brings little finger together with thumb
|
| Flexor Digiti Minimi
| Ulnar Nerve
| flexes little finger
|
| (Central Compartment)
| | |
| 1st and 2nd Lumbricals
| Median Nerve
| flexes proximal phalanx
|
| 3rd and 4th Lumbricals
| Ulnar Nerve
| and extends two distal phalanges
|
| Interossei (7)
| Deep Branch of Ulnar Nerve
| dorsal (4) abduct and palmar (3) adduct
|
| | |
| Muscles of Expresssion
| | |
| Orbicularis Oris
| buccal branch of facial (CN VII)
| closes eyelid
|
| Levator Labii Superiorus
| buccal branch of facial (CN VII)
| raises upper lip
|
| Levator Anguli Oris
| buccal branch of facial (CN VII)
| raises angle of mouth
|
| Zygomaticus Major
| buccal branch of facial (CN VII)
| pulls angle of mouth up and back (smiling)
|
| Mentalis
| mandibular branch of facial (CN VII)
| wrinkles chin (expression of doubt)
|
| Buccinator
| buccal branch of facial (CN VII)
| compresses cheeks during chewing
|
| Nasalis
| buccal branch of facial (CN VII)
| compresses and opens nasal aperture
|
| Orbicularis Oculi
| temporal and zygomatic branches
| closes eyelid
|
| Platysma
| cervical branch of facial (CN VII)
| depresses mouth and wrinkles neck
|
| | |
| Sternocleidomastoid
| accessory nerve (CN XII)
| flexes head laterally or forward
|
| | |
| | |
| | |
| Muscle
| Innervation
| Action
|
| | |
| Muscles of Mastication
| | |
| Masseter
| masseteric branch of manbibular
| |
| Temporalis
| deep temporal branch of mandibular
| |
| Medial Pterygoid
| medial pterygoid branch of mandibular
| |
| Lateral Pterygoid
| lateral pterygoid branch of mandibular
| |
| | |
| Infrahyoid Muscles
| | |
| Sternohyoid
| ansa cervicalis (C1-C3)
| depresses hyoid bone
|
| Sternothyroid
| ansa cervicalis (C1-C3)
| depresses hyoid bone
|
| Thyrohyoid
| C1
| depresses hyoid bone
|
| Omohyoid
| ansa cervicalis (C1-C3)
| depresses hyoid bone
|
| | |
| Suprahyoid Muscles
| | |
| Digastric (ant. and post.)
| "ant.: (CN V), post.: (CN VII)"
| depresses mandible; elevates hyoid
|
| Stylohyoid
| stylohyoid branch of facial
| elevates hyoid bone
|
| Mylohyoid
| mylohyoid branch of mandibular
| elevates hyoid bone and mouth floor
|
| Geniohyoid
| C1
| elevates hyoid bone
|
| | |
| | |
| Muscles of Eye
| | |
| Superior Oblique
| trochlear (CN IV)
| abducts and depresses eye
|
| Inferior Oblique
| oculomotor (CN III)
| abducts and elevates eye
|
| Superior Rectus
| oculomotor (CN III)
| adducts and elevates eye
|
| Inferior Rectus
| oculomotor (CN III)
| adducts and depresses eye
|
| Medial Rectus
| oculomotor (CN III)
| adducts eye
|
| Lateral Rectus
| abducens (CN VI)
| abducts eye
|
| Levator Palpebrae Superiorus
| oculomotor (CN III)
| raises eyelid
|
| | |
| | |
| | |
| Muscle
| Innervation
| Action
|
| | |
| Muscles of Tongue
| | |
| Genioglossus
| hypoglossal (CN XII)
| pulls tongue forward
|
| Hyoglossus
| hypoglossal (CN XII)
| depresses tongue
|
| Styloglossus
| hypoglossal (CN XII)
| draws tongue up and back
|
| Palatoglossus
| pharyngeal branch of vagus (CN X)
| elevates back of tongue
|
| | |
| Muscles of Palate
| | |
| Tensor Veli Palatini
| branch of mandibular
| tenses soft palate
|
| Levator Veli Palatini
| pharyngeal branch of vagus
| elevates soft palate
|
| Muscle of Uvula
| pharyngeal branch of vagus
| pulls uvula up
|
| Palatopharyngeus
| pharyngeal branch of vagus
| elevates pharynx during swallowing
|
| | |
| Muscles of Pharynx
| | |
| Superior Constrictor
| pharyngeal branch of vagus
| peristalsis during swallowing
|
| Middle Constrictor
| pharyngeal branch of vagus
| peristalsis during swallowing
|
| Inferior Constrictor
| pharyngeal branch of vagus
| peristalsis during swallowing
|
| Stylopharyngeus
| Glossopharyngeal nerve (CN IX)
| elevates lateral wall for swallowing and speech
|
| Salpingopharyngeus
| pharyngeal branch of vagus
| raises upper lateral wall of pharynx
|
| | |
| Muscles of Larynx
| | |
| Cricothyroid
| external laryngeal
| stretches and tenses vocal fold
|
| Posterior Cricoarytenoid
| recurrent laryngeal
| abducts vocal fold
|
| Lateral Cricoarytenoid
| recurrent laryngeal
| adducts vocal fold
|
| Thyroarytenoid
| recurrent laryngeal
| relaxes vocal fold
|
| Transverse Arytenoids
| recurrent laryngeal
| closes aditus
|
| Oblique Arytenoids
| recurrent laryngeal
| closes aditus
|