Muscles To Know (Part 1) Flashcards
Where would you find external intercostals?
Between the ribs
What do external intercostals do?
Elevates rib cage when inhaling
Where would you find internal intercostals?
In between the ribs with external intercostals lateral and the sternum medial
What do internal intercostals do?
During forceful exhalation (eg. coughing) it depresses and retracts the ribs
What major role does the diaphragm take part in?
Respiration
What does contraction of the diaphragm mean?
Increase in volume of the thoracic cavity
- air is pulled into lungs
Where would you find external obliques?
Most outer abdominal muscles
- can see them (superficial)
Where would you find internal obliques?
Below the external abdominal muscle
What do the abdominal oblique muscles allow? (3)
- Twists
- Side bends
- Sit ups
Where would you find the transverse abdomen muscle?
Below the obliques muscles
- inner most
What does the transverse abdominis help with? (3)
- Compress the ribs and viscera
- Forced expiration
- Bowl movements
Where would you find the rectus abdominis?
Runs vertically along the abdominal wall
What is the rectus abdominus important for?
Postural muscles
What does the rectus abdominus allow? (3)
- Flexing of the lumbar spine
- crunches - Forceful respiration
- Compression
Where would you find the sternocleidomastoid?
Runs obliquely across the side of the neck
What does the sternocleidomastoid muscle do? (4)
- Rotates the head to the opposite side
- Rotates the head obliquely
- Flexes the neck
- Extends the head
Where would you find the trapezius?
Middle upper back
What does the trapezius do? (4)
- Extends the head and neck
- Rotates the head and neck
- Shrugs the shoulders
- scapula moves up and down - Squeezes should blades together
Where would you find the deltoid?
By the shoulders
What does the deltoid do?
Abducts the upper arm
Where would you find the latissimus dorsi?
Mid back
What does the latissimus dorsi do?
Extends the upper arm (posteriorly) from the shoulder
Where would you find the pectoralis minor?
Starts by the scapula and goes down to link with the ribs
What does the pectoralis minor do? (2)
- Brings the shoulders forward
2. Lifts the rib cage
Where would you find the pectoralis major?
On your upper chest
What does the pectoralis major do? (2)
- Adducts the arm
- medial direction - Extends the arm at the shoulder from a flexed position
- anterior direction
