Muscles Flashcards
Supraspinatus
Abduction-arm 0-15, assists deltoid 15-90
Suprascapular nerve
Infraspinatus
Lateral rotation- arm
Suprascapular nerve
Teres minor
Lateral rotation
Axillary nerve
Subscapularis
Medial rotation- arm
Subscapular nerve
Subscapularis
Medial rotation-arm
Subscapular nerve
Teres minor
Lateral rotation -arm
Axillary nerve
Deltoid
Anterior fibres- flexion and medial rotation
Posterior fibres- extension and lateral rotation
Middle fibre- major abductor of the arm, 15-90
Axillary nerve
Teres major
Medial rotation-arm
Lower subscapular nerve
5 extrinsic muscles of shoulder
Superficial Trapezius Latissimus dorsi Deep Levator Scapulae Rhomboid Minor Rhomboid Major
Trapezius
Upper fibres- elevation and rotation- scapula
Middle fibres- retraction- scapula
Lower fibres- Depression- shoulder
Accessory nerve
Latissimus dorsi
Extension, adduction, medial rotation -arm
Thoracodorsal nerve
Levator scapulae
Elevation- scapula
Dorsal Scapular nerve
Rhomboid minor
Retraction and rotation- scapula
Dorsal scapular nerve
Rhomboid major
Retraction and rotation- scapula
Dorsal scapulae nerve
Muscles of the pectoral region
Pectoralis Major
Pectoralis Minor
Serratus Anterior
Subclavius
Pectoralis major
Adduction, flexion and medial rotation
Lateral and medial pectoral nerves
Pectoralis minor
Protraction and depression- scapula
Medial pectoral nerve
Serratus Anterior
Protraction- scapula
Long Thoracic nerve
Subclavius
Depression- clavicle
Nerve to subclavius
Muscles of the upper arm
Anterior compartment: Biceps Brachii Coracobrachialis Brachialis Posterior compartment: Triceps Brachii
Innervation of the upper arm
Anterior compartment- musculocutaneous nerve
Posterior compartment- Radial nerve
Biceps Brachii
Supination and flexion- forearm
Musculocutaneous nerve
Coracobrachialis
Flexion, adduction- arm
Musculocutaneous nerve
Brachialis
Flexion- forearm
Musculocutaneous nerve
Triceps Brachii
Extension- forearm
Radial nerve
Muscles of the forearm- anterior compartment
Superficial- medial to lateral FCU Palmaris longus FCR Pronator teres
Intermediate
Flexor Digitorum Superficialis
Deep
Flexor Digitorum Profundus
Flexor Pollicis Longus
Pronator Quadratus
Flexor Carpi Ulnaris
Flexion+ adduction- wrist
Ulnar nerve
Innervation, function and origin of muscles in the anterior compartment of forearm
Median nerve exc. FCU
Flexion- wrist+fingers
Pronation
Originates from a common Tendon which arises form the medial epicondyle of the humerus
Palmaris longus
Flexion- wrist
Median nerve
Flexor Carpi Radialis
Flexion, abduction- wrist
Median nerve
Pronator Teres
Pronation- forearm
Median nerve
Flexor Digitorum Superficialis
Flexion- MCPJ + PIPJ of the 4 fingers+ wrist
Median nerve
Flexor Digitorum Profundus
Flexion- DIPJ+ wrist
Median nerve
Muscles of the forearm- posterior compartment
Superficial- lateral to medial Brachioradialis ECRL ECRB Extensor Digitorum Extensor Digiti Minimi ECU Anconeus
Deep- lateral to medial Supinator Abductor Pollicis Longus Extensor Pollicis Longus and Brevis Extensor Indicis Proprius
Pronator Quadratus
Pronation- forearm
Median nerve
Muscles of the forearm- posterior compartment
Superficial- lateral to medial Brachioradialis ECRL ECRB Extensor Digitorum Extensor Digiti Minimi ECU Anconeus
Deep- lateral to medial Supinator Abductor Pollicis Longus Extensor Pollicis Longus Longus and Brevis Extensor Indicis
Innervation, function and origin of muscles in the posterior compartment of forearm
Radial nerve
Extension-wrist+ fingers
All Deep muscles exc. supinator acts on the thumb+ index finger
All Superfical muscles exc Brachioradialis+ECRL+ Anconeus have a common extensor tendon that originates from the lateral epicondyle of the humerus
Brachioradialis+ ECRL originates from the lateral supracondylar ridge
Anconeus originates from the lateral epicondyle
Extensor Digitorum
Extension-MCPJ + IPJ of medial 4 fingers
Radial nerve
To test the function of this muscle, the forearm is pronates and fingers are extended against resistance
Extensor Carpi Radialis Longus
Extensor Carpi Radialis Brevis
Extension+ Abduction- wrist
Radial nerve
Extensor Digitorum
Extension-MCPJ + IPJ of medial 4 dingers
Radial nerve
To test the function of this muscle, the forearm is pronates and fingers are extended against resistance
Extensor Digiti Minimi
Extension- little finger+ wrist
Radial nerve
Extensor Carpi Ulnaris
Extension + adduction- wrist
Radial nerve
Anconeus
Extension- forearm (assists triceps)
Abduction- ulna during pronation
Radial nerve
Supinator
Supination- forearm
Radial nerve
Abductor Pollicis Longus
Abduction-thumb
Radial nerve
Extensor Pollicis Brevis
Extension- MCPJ+ IPJ of thumb
Radial nerve
Extensor Pollicis Longus
Extension- CMCJ+MCPJ+IPJ of thumb
Radial nerve
Extensor Indicis Proprius
Extension- index finger
Radial nerve
Muscles of the Hand
Intrinsic muscles- located within the hand itself Thenar muscles- lateral to medial Opponens Pollicis Abductor Pollicis Brevis Flexor Pollicis Brevis
Hypothenar muscles
Deep- Opponens Digiti Minimi
Superficial- Abductor Digiti Minimi
Lateral to ADM- Flexor Digiti Minimi Brevis
1st- 4th Lumbrical Muscles- lateral to medial
Interossei
Dorsal Interossei Muscles
Palmar Interossei Muscles
Palmaris Brevis
Adductor Pollicis
Innervation of the intrinsic muscles of the hand
All Ulnar nerve exc. Thenar muscles and lateral 2 Interossei
Opponens Pollicis
Medial rotation+flexion -thumb
Median nerve
Abductor Pollicis Brevis
Abduction- thumb
Median nerve
Flexor Pollicis Brevis
Flexion- MCPJ- thumb
Median nerve
Opponens Digiti Minimi
Rotation- little finger (Opposition)
Ulnar nerve
Abductor Digiti Minimi
Abduction- little finger
Ulnar nerve
Flexor Digiti Minimi Brevis
Flexion- MCPJ- little finger
Ulnar nerve
Lumbricals
Flexion- MCPJ- fingers
Extension- IPJ- fingers
Lateral 2 lumbricals- median nerve
Medial 2 lumbricals- ulnar nerve
Dorsal Interossei
Abduction- MCPJ- fingers
Ulnar nerve
Palmar Interossei
Adduction- MCPJ- fingers
Ulnar nerve
Palmaris Brevis
Small, thin muscle found superficially in the Subcutaneous muscle of the hypothenar eminence
Wrinkles skin- hypothenar eminence
Deepens hollow of hand- assists grip
Ulnar nerve
Adductor Pollicis
Large triangular muscle, two heads, palm
Adduction- thumb
Ulnar nerve
Bounderies of the axilla
Apex- Lat. border of 1st rib, Sup. Border of scapula, Post. Border of clavicle
Lateral wall- intertubercular groove of the humerus
Medial wall- serratus anterior and the thoracic wall( ribs and intercostal muscles)
Anterior wall- Pectoralis major and minor
Posterior wall- Subscapularis, Teres Major, Latissmus Dorsi
Base- skin of armpit and axillary fascia from arm to thoracic wall
Contents of the axilla
Axillary artery and branches
Axillary vein and branches
Axillary lymph nodes
Brachial plexus
Bounderies of the anatomical snuffbox
Ulnar(medial border)- Tendon of Extensor Pollicis Longus
Radial(Lateral border)- Tendons of Abductor Pollicis Longus and Extensor Pollicis Brevis
Proximal border-Styloid process of radius
Floor- carpal bones- scaphoid and trapezium
Roof- Skin
Contents of their cubital fossa
Lateral to Medial- Radial nerve Biceps tendon Brachial artery Median nerve
Bounderies of the anatomical snuffbox
Ulnar(medial border)- Tendon of Extensor Pollicis Longus
Radial(Lateral border)- Tendons of Abductor Pollicis Longus and Extensor Pollicis Brevis
Proximal border-Styloid process of radius
Roof- Skin
Contents of the anatomical Snuffbox
Radial artery
Superficial branch of the radial nerve
Cephalic vein
Bounderies of the carpal tunnel
Carpel Arch-
Lat.- Scaphoid, Trapezium tubercles
Med.- hook of hamate, pisiform
Superficial flexor retinaculum-roof
Function of the Superficial flexor retinaculum
Hold the tendons to the bony plane at the wrists and prevents them from bowing
Contents in the Carpel tunnel
9 tendons- surrounded by synovial sheath Tendon of Flexor Pollicis Longus 4 Tendons of Flexor Digitorum Profundus 4 Tendons of Flexor Digitorum Superficialis Median nerve
Carpel tunnel Syndrome- cause
Compression of median nerve
Inflammation of synovial sheath, fluid retention, infection
Carpel Tunnel Syndrome- Symptoms
Pain or parathesia in the distribution of the median nerve
Palm is spared as the palmar cutaneous branch does not travel through the carpel tunnel
Symptoms associated with waking from sleep and worse in the mornings
Diagnosis- Tinnel’s sign
Phalen’s test
Muscles of the Gluteal region
Superficial abductors and extenders Gluteus Maximus Gluteus Medius Gluteus Minimus Tensor Fascia Lata
Deep lateral rotators-sup to inf Piriformis Gemelli superior Obturator Internus Gemelli inferior Quadratus femorus
Gluteus Maximus
Extension-thigh
Assists Lateral rotation-thigh
Inferior Gluteal Nerve
Gluteus Medius
Abduction + Medial Rotation- thigh
Secures pelvis during locomotion
Superior Gluteal Nerve
Gluteus Minimus
Abduction + Medial rotation thigh
Secures pelvis during locomotion
Superior Gluteal Nerve
Tensor Fascia Lata
Lies towards to the anterior edge of the iliac crest
Assists Gluteus Medius and Minimus in Abduction of the lower limb
Superior Gluteal Nerve
General actions of deep Gluteal muscles
Lateral rotation- thigh
Stabilise hip joint by pulling the femoral head into acetabulum of the pelvis
Piriformus
Lateral rotation+ Abduction- thigh
Nerve to piriformus
Gemelli Superior
Lateral rotation+ Abduction- thigh
Nerve to Obturator Internus
Obturator Internus
Lateral rotation+ Abduction
Nerve to Obturator Internus
Gemelli Inferior
Lateral rotation+ Abduction
Nerve to Quadratus Femoris
Quadratus Femoris
Lateral Rotation
Nerve to Quadratus Femoris
Muscles in the Anterior Compartment of the thigh
Iliopsoas -Iliacus - Psoas major Quadriceps Femoris - Vastus Lateralis - Vastus Intermedius - Vastus Medialis - Rectus Femoris Sartorius Pectineus
Insertion, Innervation and Function of muscles in the anterior compartment of the thigh
Iliopsoas
Insertion- common tendon, insert onto the lesser trochanter of the femur
Flexion- thigh
Quadriceps Femoris
Quadriceps Tendon- attach to patella
Main extensor of the Knee
All muscles exc. Psoas Major- Femoral nerve
Iliacus
Flexion- thigh
Femoral nerve
Psoas Major
Flexion- thigh
Anterior rami of L1-3
Vastus Lateralis
Vastus Intermedius
Vastus Medialis
Extension- leg
Stabilises Patella
Femoral nerve
Rectus Femoris
Flexion- thigh
Extension- leg
Sartorius
Flexion+ Adduction+ Lateral rotation- Thigh
Flexion- Leg
Femoral nerve
Pectineus
Adduction+ Flexion- Thigh
Femoral Nerve
Muscles in the Medial Compartment of the thigh
Hip Adductors- Inf- Sup
- Adductor Magnus
- Adductor Longus
- Adductor Brevis
- Obturator externus
Gracilis- most superficial
Innervation, Arterial supply of the muscles in the medial compartment of the thigh
Obturator Nerve
Obturator artery
Adductor Magnus
Adduction- Thigh
Adductor Component- Flexion- thigh
Obturator nerve
Hamstring Component- Extension- thigh
Tibial nerve
Adductor Longus
Adduction- thigh
Obturator nerve
Adductor Brevis
Adduction- thigh
Obturator nerve
Obturator Externus
Adduction+ lateral rotation- thigh
Obturator nerve
Gracilis
Adduction- thigh
Flexion- leg
Obturator nerve
Muscles in the Posterior Compartment of the Thigh
Hamstrings- Lat- med
- Biceps Femoris
- Semitendinosis
- Semimembranosus
Innervation and function of the Muscles in the Posterior Compartment of the Thigh
Sciatic nerve All exc the short head - tibial part Short Head- Common Fibular part Flexion- Leg Extension- Thigh
Biceps Femoris
Flexion- Leg
Extension- Thigh
Lateral Rotation- Thigh+ Leg
Semitendinosus
Flexion- Leg
Extension- Thigh
Medial Rotation- Thigh+ Leg
Semimembranosus
Flexion- Leg
Extension- Thigh
Medial Rotation- Thigh+ Leg
Muscles in the Anterior Compartment of the Leg
Tibialis Anterior
Extensor Digitorum Longus
Extensor Hallucis Longus
Fibularis Tertius
Innervation, blood supply and action of the muscles in the Anterior Compartment of the Leg
Deep Fibular nerve
Anterior Tibial artery
Dorsiflexion and Inversion- foot
Tibialis Anterior
Dorsiflexion+ inversion- foot
Deep Fibular Nerve
Extensor Digitorum Longus
Extension- lateral 4 toes
Dorsiflexion- Foot
Deep Fibular Nerve
Extensor Hallucis Longus
Extension- great toe
Dorsiflexion- Foot
Deep Fibular Nerve
Fibularis Tertius
Eversion+ Dorsiflexion- foot
Deep Fibular nerve
Muscles in the Lateral Compartment of the Leg
Fibularis Longus
Fibularis - deeper and shorter
Innervation and function of the muscles in the lateral compartment of the leg
Superficial Fibular nerve- Peroneal nerve
Eversion
Fibularis Longus
Eversion+ plantarflexion- foot
Support Lateral and Transverse arch
Superficial Fibular nerve- peroneal nerve
Fibularis Brevis
Eversion of the foot
Superficial Fibular nerve- Peroneal nerve
Muscles in the posterior compartment of the Leg
Superficial Muscles
Gastrocnemius
Plantaris
Soleus
Deep Muscles Popliteus Med-Lat in medial view of tendons Tibialis Posterior Flexor Digitorum Longus Flexor Hallucis Longus
Innervation, function and insertion of muscles in the posterior compartment of the Leg
Tibial nerve
Plantarflexion+ Inversion- foot
Superficial muscles- calcaneal tendon- calcaneus
Gastrocnemius
Plantarflexion- foot
Flexion- Knee
Tibial nerve
Plantaris
Plantarflexion
Flexion- Knee
Tibial nerve
Soleus
Plantarflexion- foot
Tibial nerve
Popliteus
Lateral rotation- femur on tibia
Unlocking- knee joint- flexion
Tibial nerve
Tibialis Posterior
Invertion and Plantarflexion- foot
Maintains Medial Arch
Tibial nerve
Flexor Digitorum Longus
Flexion- lateral 4 toes
Tibial nerve
Flexor Hallucis Longus
Flexion- great toe
Tibial nerve
Muscles of the Foot
Instrinsic- located within the foot
Dorsal- lat- med
- Extensor Digitorum Brevis
- Extensor Hallucis
Plantar- 10
First Layer- med- lat
- Adductor Hallucis
- Flexor Digitorum Brevis
- Abductor
Second Layer -Flexor digitorum tendons
- Quadratus Plantae
- Lumbricals
Third Layer- med- lat
- Flexor Hallucis Brevis
- Adductor Hallucis
- Flexor Digiti Minimi
Fourth Layer
- Plantar Interossei
- Dorsal Interossei
Innervation and function of muscles of the foot
Dorsal
Deep Fibular nerve
Assists extrinsic muscles
Plantar
Medial or Lateral Plantar Nerve (branches of tibial)
Stabilise arches of foot
Control movements of digits
Extensor Digitorum Brevis
Extension- MTPJ+IPJ - lateral 4 toes
Deep Fibular nerve
Extensor Hallucis Brevis
Extension- MTPJ- Great toe
Deep Fibular nerve
Abductor Hallucis
Abduction+ flexion- Great tor
Medial Plantar Nerve
Flexor Digitorum Brevis
Flexion- PIPJ- lateral 4 digits
Medial Plantar Nerve
Abductor Digiti Minimi
Abduction+ Flexion- 5th Digit
Lateral Plantar Nerve
Quadratus Plantae
Assists flexor digitorum longus in flexion- lateral 4 digits
Lateral Plantar nerve
Lumbricals
Flexion- MTPJ
Extension- IPJ
Medial 2- Medial plantar nerve
Lateral 3- lateral plantar nerve
Flexor Hallucis Brevis
Flexion- MTPJ- great toe
Medial Plantar nerve
Adductor Hallucis
Adduction- great toe
Assists in forming transverse arch
Deep branch of Lateral plantar nerve
Flexor Digiti Minimi Brevis
Flexion- MCPJ- 5th digit
Lateral Plantar nerve
Plantar Interossei
Adduction- digits 2-4
Flexion- MTPJ
Lateral Plantar nerve
Dorsal Interossei
Adduction- digits 2-4
Flexion- MTPJ
Lateral Plantar nerve
Bounderies of the Femoral Triangle
Sup- Inguinal Ligament Lat- Medial border of Satorius Med.- Medial border of Adductor Longus Floor- Pectineus, Iliopsoas and adductor longus Roof- Fascia Lata
Contents of the Femoral Triangle
Lat-med Femoral Nerve Femoral artery Femoral Vein Femoral Canal- lymph nodes
Borders of the Popliteal Fossa
Superomedial- Semimembranosus
Superolateral- Biceps Femoris
Inferomedial- Medial head of gastrocnemius
Inferolateral- lateral head of gastrocnemius and plantaris
Floor- Posterior surface of Femur
Roof- Popliteal fascia+ skin
Contents of the Popliteal Fossa
Medial to lateral-
Popliteal artery
Popliteal vein
Tibial nerve