Grouped Muscle Actions Flashcards
Intrinsic back muscles
Splenius capitis Splenius cervicis Semispinalis capitis Erector spinae- bilaterally extend spine or flex unilaterally *Innervated by Dorsal rami*
Bilateral Head Extensors
Semispinalis Capitis - deeper and directed vertically
Splenius capitis - above semisplinalis and directed more laterally
Splenius cervicis - more lateral to the splenius capitis
Splenius muscles innervated by Dorsal Rami C1-6
Semispinalis innervated by Dorsal Rami C4-8
Depressors of Scapula
Inferior Fibers of Trapezius - Spinal Accessory nerve
External Arm Rotators
Teres Minor
Infraspinatus
Retractors of scapula
And innervation
Rhomboids (Major and Minor) - dorsal scapular nerve
Middle fibers of Trapezius - spinal accessory nerve
Internal Arm Rotators
Pectoralis Major
Latissimus Dorsi
Subscapularis
Teres Major
Protractor of Scapula (and innervation)
Serratus Anterior
Innervated by Long Thoracic nerve C5-7
Arm Flexors
Coracobrachialis
Biceps
Pectoralis Major
Deltoid
Arm Extensors
Latissimus Dorsi
Deltoid
Triceps
Teres Major
Arm Abductors
Supraspinatus (1st 15 degrees)
Deltoid
Arm Adductors
Latissimus Dorsi Pectoralis Major Teres Major Coracobrachialis Long Head Tricep
Forearm Supinators
Biceps (major supinators*)
Supinator
Forearm Protonators
Protonator Teres
Protonator Quadratus
Elbow Extensors
Triceps
Elbow Flexors
Biceps Brachii,
Brachialis,
Brachioradialis (when arm is semi protonated)
Forearm Supinator Muscles
Biceps Brachii (major), Supinator
Forearm Protonator Muscles
Protonator Teres (major), Protonator Quadratus
Wrist Flexors
Flexor digitorum Superficialis,
Flexor carpi radialis,
Flexor carpi ulnaris
Palmaris Longus
Wrist Extensors
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor Carpi ulnaris
Digit Flexors
Be specific with fingers
Flexor digitorum profundus (DIP @ fingers 2-4)
Flexor Pollicis Brevis (thumb)
Flexor Pollicis Longus
Digit Extensors
Extensor pollicis longus (thumb), Extensor pollicis brevis (thumb), Extensor indicis (2nd finger), Extensor digitorum (fingers 2-5), Extensor digiti minimi (5th finger)
Digit abductors
Dorsal interrosei (4) Abductor Pollicis brevis (thumb) “DAB = dorsal abductors”
Digit adductors
Palmar interosseus (3) Adductor pollicis (thumb)
Lateral Thigh Rotators at the Hip (5)
Piriformis, Gemellus Superior, Obturator Internus, Gemellus Inferior, Quadratus Femoris “P-Go-Go-Q”
Medial Thigh Rotators (2)
Gluteus medius,
Gluteus Minimus
Hip Abductors (2)
(And innervation)
Include test for Defect
Gluteus medius,
Gluteus minimus
Innervated by Superior gluteal nerve
“Unable to stabilize hip when standing on one leg ~ tilts to affected side”
Thigh Extensor at the Hip (and innervation)
Include test for Defect
Gluteus Maximus
(Inferior Gluteal nerve)
(+) Gower’s test - patient has to lean back to walk
Thigh Flexors at the Hip
And innervations
Tensor Fascia Latae - innervated by Superior gluteal nerve
Pectineus - innervated by Obturator and Femoral Nerves
Illiopsoas - Femoral Nerve
Hip Adductors (7) (include innervation)
Adductor Brevis, Adductor Longus, Adductor Magnus (extensor part innervated by Tibial nerve) Adductor Minimus, Pectineus, Obturator Externus, Gracilis - most medial “Medial thigh muscles” ~ innervated by Obturator Nerve
Leg Extensors at the Knee (4)
“Thigh Flexors” (and innervation)
Vastus lateralis, Vastus Intermedius, Vastus Medialis, Rectus Femorus “All 4 heads of the quadriceps innervated by Femoral Nerve”
Leg Flexors at the Knee (3)
“Thigh Extensors” (and innervation)
Biceps Femoris
Semitendinosus
Semimembranosus
“Hamstrings innervated by Tibial nerve, except Short head of Biceps femoris: Common fibular nerve”
Foot Dorsiflexors (4) at the Ankle (and innervation)
Tibialis anterior Extensor Hallucis Longus Extensor Digitorum Longus Fibularis Tertius *All ANTERIOR innervated by Deep Fibular Nerve* Mnemonic: “Deep Dorsiflexors”
Foot Plantar Flexors at the Ankle (and innervation)
Gastrocnemius Soleus Plantaris Flexor Hallucis Longus Flexor Digitorum Longus Tibialis Posterior *All innervated by Tibial Nerve and found in POSTERIOR LEG* Mnemonic: “Posterior Plantars”
Foot Everters (and innervation)
Fibularis Longus - weak plantar flexion
Fibularis Brevis - weak plantar flexion
Both innervated by Superficial Fibular Nerve and in LATERAL LEG
Mnemonic: “Lateral Super Fibs”
Elevators of the Scapula
And innervation
Superior fibers of Trapezius - spinal accessory nerve
Levator Scapula - dorsal scapular nerve
Foot Inverters (and innervation)
Tibialis Posterior - weak inverter and good plantar flexor
Innervated by Tibial nerve
