APE 4: Gross Structure and Function of the Muscular System Flashcards
What are the 3 main types of muscle?
- Cardiac
- Skeletal
- Smooth
Which muscles are involuntary?
Cardiac and Smooth
Which muscle is voluntary?
Skeletal
Give two examples of a unipennate muscle
Tibialis anterior and extensor digitorum longus
Give an example of a bipennate muscle
Rectus femorus
Give an example of a multipennate muscle
Deltoid
Give two examples of a quadrate muscle
Rhomboid muscles and quadratus femoris
Give an example of a strap/parallel muscle
Sartorius
Give an example of a fusiform muscle
Biceps brachii
Give an example of a circular muscle
Obicularis oris
Give an example of a convergent muscle
Pectoralis major
What is the origin of a muscle?
The proximal end of the muscle that remains fixed during muscular contraction
What is the insertion of a muscle?
The distal end of a muscle that is movable
What is aponeurosis?
The tendons of some muscles that can be strecthed out into a sheet
Give an example of aponeurosis
The lateral abdominal muscles
What is the agonist?
The main muscle producing a specific movement
What is the antagonist?
The muscle that opposes the action of the agonist
What does a fixator do?
It steadies the proximal part of the limb when a more distal part is being moved
What does a synergist do?
It complements the action of the agonist
Which major muscles cause flexion of the hip?
Iliopsoas group and quadriceps femoris group
Which major muscles cause extension of the hip?
Gluteus maximus and hamstrings group
Which major muscles cause adduction of the hip?
Adducter muscles
Which major muscles cause abduction of the hip?
Abducter muscles
What causes flexion and medial rotation of the shoulder?
Anterior fibres of deltoid muscle
What causes extension and lateral rotation of the shoulder?
Posterior fibres of deltoid muscle
What causes adduction of the shoulder?
Teres major muscle
What causes abduction of the shoulder?
Deltoid muscle
Which nerve supplies the biceps brachii muscle?
Musculocutaneous nerve
Which nerve supplies the biceps femorii muscle?
Long head= tibial nerve
Short head= common fibular nerve
Which nerve supplies the triceps brachii muscle?
Radial nerve
Which nerve supplies the quadriceps femoris muscle?
Femoral nerve
What is the insertion of the quadriceps femoris muscle?
Tibial tuberosity
What is the relationship of the quadriceps femoris muscle to the patella?
It distally attaches to the patella via the patella tendon
What type of bone is the patella?
Sesamoid
What are the two compartments of the upper arm?
Anterior and posterior
Which muscles are in the anterior compartment of the upper arm?
Biceps brachii, brachialis and coracobrachialis
Which nerve innervates the anterior compartment of the upper arm?
Musculocutaneous nerve
Which artery supplies the anterior compartment of the upper arm?
Muscular branches of the brachial artery
What is the main action of the anterior compartment of the upper arm?
Flexion of the arm and shoulder
Which muscle is in the posterior compartment of the upper arm?
Triceps brachii
Which nerve supplies the posterior compartment of the upper arm?
Radial nerve
Which artery supplies the posterior compartment of the upper arm?
Profunda brachii artery
What is the main action of the posterior compartment of the upper arm?
Extension of the arm
What are the two compartments of the forearm?
Anterior and posterior
What are the three compartments in the anterior compartment of the forearm?
Superficial, intermediate and deep
What muscles are in the superficial anterior compartment of the forearm?
Flexor carpi ulnaris, palmaris longus, flexor carpi radialis and pronator teres
Which two nerves supply the superficial anterior compartment of the forearm?
Median and ulnar nerve
What is the main action of the superficial anterior compartment of the forearm?
Flexion of the wrist
Which muscle is found in the intermediate anterior compartment of the forearm?
Flexor digitorum superficialis
Which nerve innervates the intermediate anterior compartment of the forearm?
Median nerve
What is the main action of the intermediate anterior compartment of the forearm?
Flexion of the finger joints and the wrist
Which muscles are found in the deep anterior compartment of the forearm?
Flexor digitorum profundus, flexor pollicis longus, and pronator quadratus
Which nerves innervates the deep anterior compartment of the forearm?
Ulnar nerve= medial half
Median nerve=lateral half
What is the main action of the deep anterior compartment of the forearm?
Flexion of finger joints and pronation of forearm
What are the three compartments of the thigh?
Anterior, medial and posterior
Which nerve innervates the anterior compartment of the thigh?
Femoral nerve
What is the main action of the anterior compartment of the thigh?
Extension of the leg
What muscles are found in the anterior compartment of the thigh?
Pectineus, sartorius and quadriceps femoris
Which artery supplies the anterior compartment of the thigh?
Femoral artery
Which nerve innervates the medial compartment of the thigh?
Obturator nerve
What is the main action of the medial compartment of the thigh?
Hip adduction
Which artery supplies the medial compartment of the thigh?
Obturator artery
What muscles are found in the medial compartment of the thigh?
Adductor muscles, obturator externus and gracilis
Which nerve innervates the posterior compartment of the thigh?
Both branches of the sciatic nerve- tibial and common femoral
What muscles are found in the posterior compartment of the thigh?
Hamstring muscles including biceps femoris
Which arteries supply the posterior compartment of the thigh?
Branches of the inferior gluteal and profunda femoris artery
What is the main action of the posterior compartment of the thigh?
Extension of thigh and flexion of leg
What are the three compartments of the leg?
Anterior, lateral and posterior
What muscles are in the anterior compartment of the leg?
Tibialis anterior, extensor digitorum longus, extensor hallucis longus and fibularis tertius
What are the main actions of the anterior compartment of the leg?
Dorsiflexion and inversion
Which nerve innervates the anterior compartment of the leg?
Deep fibular nerve
Which artery supplies the anterior compartment of the leg?
Anterior tibial artery
What muscles are in the lateral compartment of the leg?
Fibularis longus and brevis
What is the main action of the lateral compartment of the leg?
Eversion
Which nerve innervates the lateral compartment of the leg?
Superficial fibular (peroneal) nerve
Which artery supplies the lateral compartment of the leg?
Branches of the common fibular (peroneal) artery
What are the two compartments of the posterior compartment of the leg?
Superficial and deep
What muscles are in the superficial posterior compartment of the leg?
Gastrocnemius, plantaris and soleus
Which nerve innervates the superficial posterior compartment of the leg?
Tibial nerve
What is the main action of the superficial posterior compartment of the leg?
Plantarflexion
Which artery supplies the superficial posterior compartment of the leg?
Posterior tibial artery
What muscles are in the deep posterior compartment of the leg?
Popliteus, tibialis posterior, flexor digitorum longus, flexor hallucis longus
Which nerve innervates the deep posterior compartment of the leg?
Tibial nerve
What is the main action of the deep posterior compartment of the leg?
Many actions- flexion of digits, plantarflexion and inversion, lateral rotation
Which artery supplies the deep posterior compartment of the leg?
Posterior tibial artery