www.johnston.k12.nc.us

www.johnston.k12.nc.us

1.05 Understand the functions of the muscular system 1.05 Understand the functions of the muscular system What are the functions of the muscular system? 1.05 Understand the functions and disorders of the muscular 2 Functions of the Muscular System What are the functions

of the muscular system? Movement Form and shape Body heat to maintain body temperature 1.05 Understand the functions and disorders of the muscular 3 Movement: Skeletal Muscle Receptors in muscles provide the brain with information about body position and movement. The brain controls the contraction of skeletal muscle.

1.05 Understand the functions and disorders of the muscular 4 Movement Mechanism of skeletal muscle movement: Point of origin Part of skeletal muscle that is attached to a fixed structure or bone. It moves the least during muscle contraction Point of insertion Is the other end of muscle, which attached to a movable

part, it is the part that moves the most 1.05 Understand the functions and disorders of the muscular 5 Movement Prime mover produces movement in a single direction Biceps brachii Antagonist

produces movement in the opposite direction tricep Synergists a muscle that helps to stabilize a movement or joint brachialis 1.05 Understand the functions and disorders of the muscular

6 Movement: Digestive System The nervous system regulates the speed at which food moves through the digestive tract. 1.05 Understand the functions and disorders of the muscular 7 Movement: Circulatory System Heartbeat The nervous system and hormones regulate the speed at which the heart beats.

1.05 Understand the functions and disorders of the muscular 8 Posture How does the muscular system effect posture? Muscles not being used can cause some muscles to tighten and some to get weak and the muscle then becomes longer which causes bad posture. 1.05 Understand the functions

and disorders of the muscular 9 Body Heat What is the bodys response to cold? Why? When you get cold your brain sends signals to your muscles that make them tense up. When the muscles in your skin that are attached to hairs do this, they make the hairs stand up and pull your skin up just a bit, creating goose bumps. How is this response helpful? Muscles begin to create heat How does the body respond to exercise? Why? Muscles produce heat, and body produces perspiration when needed to cool the muscles down.

1.05 Understand the functions and disorders of the muscular 10 video on muscle contraction: antagonist/synergists https://www.youtube.com/watch?v=I80Xx7 pA9hQ 1.05 Understand the functions and disorders of the muscular 11 1.05 Understand the functions

and disorders of the muscular 12 1.05 Understand the disorders of the muscular system 1.05 Understand the disorders of the muscular system What are common disorders of the muscular system? How are muscular disorders treated? How does the muscular system relate to the bodys support and movement? 1.05 Understand the functions

and disorders of the muscular 14 Myopathy Myomuscle -pathy Disease or condition 1.05 Understand the functions and disorders of the muscular 15 Fibromyalgia Fibromyalgia

Cause - unknown Symptoms chronic muscle pain that lasts 3-4 months in certain muscle points. Headache, fatigue, feelings of numbness, pain in the joints, mostly found in women. Diagnosis a blood test called a FM/A identifies blood cell markers produced by immune system Treatment - focus on pain relief, stretching, regular excise, enough sleep, massage therapy, chiropractic procedures, relaxation techniques Prognosis- chronic long term disorder, controlling systems is the best that can be done. 1.05 Understand the functions and disorders of the muscular

16 Hernia Causes occurs when an organ protrudes through a weak muscle Locations abdominal hernia - organ (sm. Intestine) protrudes through abdominal muscle wall inguinal hernia - organ (sm. Intestine) protrudes through groin muscles hiatal hernia - stomach protrudes up through the diaphragm Symptoms abdominal = pain, swelling,

inguinal - soft lump in groin, pain, swelling hiatal - burning in stomach with possible vomiting 17 Hernia Diagnosis self diagnose or doctor Treatment Organ goes back through the muscle wall on its own Doctor can push it back into the right place Surgery to put back into place and repair muscle Prevention

Not smoking and avoid persistent cough Maintain healthy body weight Avoid straining during bowel movement Do not lift weights or objects too heavy for you, lift with knees not back 1.05 Understand the functions and disorders of the muscular 18 Muscle Spasms or Cramp is a sustained muscle contraction (Involuntary hypertonicity) Causes

possible overuse of muscle or electrolyte abnormalities Locations calf, trapezius, chest wall, latissimus dorsi, legs toes Symptoms quick painful cramping of muscle and leaves quickly Diagnosis self diagnose, bad enough see a doctor Treatment stretching, exercising, medication, massage 19 Muscular Dystrophy (MD) MD is a group of diseases in which the muscle

cells deteriorate. Cause genetic defect Symptoms - weakness of the muscles, falling, waddling gait, difficulty getting up from a lying or sitting position 1.05 Understand the functions and disorders of the muscular 20 Muscular Dystrophy (MD) Diagnosis Genetic testing, muscle biopsies, blood tests, exercise assessments

Treatment Physical therapy, respiratory therapy, speech therapy, drug therapy, possible surgery Prognosis Depending on the type of MS some live to in their 20s 1.05 Understand the functions and disorders of the muscular 21 Myasthenia Gravis Grave muscle weakness occurs when the connection between the nerves and muscle is lost.

Cause: it is autoimmune Symptoms droopy eyelids, double vision, difficulty swallowing (dysphagia) Diagnosis blood test for the abnormal antibodies 1.05 Understand the functions and disorders of the muscular 22 Myasthenia Gravis Treatment

medications thymectomy plasmapheresis Prognosis Symptoms of myasthenia gravis usually progress to maximum severity within 3 years. After 3 years, patients usually stabilize or improve. Infants with transient neonatal MG may develop acute respiratory failure with a few weeks after bireth 1.05 Understand the functions and disorders of the muscular

23 Strain What happened here? Tearing and straining of the muscle causing injury and bleeding in the muscle What symptoms is this man having? Why? Pain Swelling Depending on strain, inability to use muscle 1.05 Understand the functions and disorders of the muscular

24 Strain How will he treat them? R.I.C.E. Rest Ice Compression Elevation What is his prognosis? With treatment muscle should repair without

difficulty 1.05 Understand the functions and disorders of the muscular 25 Tendonitis Inflammation of the tendon Cause It can be a sudden injury, but it is most likely to come from the repetition of a particular movement over time. Symptoms Pain and tenderness along a tendon, usually near a joint

Pain at night Pain that is worse with movement or activity 1.05 Understand the functions and disorders of the muscular 26 Tendonitis Diagnosis Physical exam to look for signs of pain and tenderness when the muscle attached to the tendon is used against resistance Treatment Goal is pain relief Rest or immobilization of the affected tendons with splint or brace Nonsteriodal anti-inflammatory medications (aspirin or

ibuprofen) Physical therapy Prognosis Symptoms improve with treatment and rest. If injury is from overuse, change work habits to prevent recurrence. 1.05 Understand the functions and disorders of the muscular 27 Tetanus Cause infection of the nervous system with the potentially deadly bacteria Clostridium tetani

Symptoms Mild spasms in the jaw muscles (lockjaw) Chest and neck spasms Back spasms that often cause arching of the back Can affect muscles that help with breathing which can lead to breathing problems Diagnosis Physical exam and ask about your medical history - vaccination 28 Tetanus Treatment

Antibiotics Bed rest with a non stimulating environment Medicine to reverse the poison Muscle relaxers Sedatives Surgery Prognosis

Without treatment you can die With treatment less than 10% of infected people die 1.05 Understand the functions and disorders of the muscular 29 1.05 Understand the functions and disorders of the muscular system What are the characteristics of muscles? What are the functions of the muscular system? What are common disorders of the muscular system? How are muscular disorders treated? How does the muscular system relate to the

bodys support and movement? 1.05 Understand the functions and disorders of the muscular 30

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