If you force your knee into entension with your hips already fully flexed, you risk pulling what muscles?
Name three muslces most commonly used for intramuscular injections in adults.
Deltoid, Quad muscles, gluteus maximus
Where are most felxor and and extensor muscles located? What is an exception?
Flexor are found on anterior apsects while extensor are found on posterior. An exception is the flexor/extensor musculature of the knee
Describe the rectus abdominus muscle.
Name means "straight" muslce of abdomen, eclosed by rectus sheath, produces forward bending at the waist, linea alba is seen b/w the left and right
Describe the external oblique muscle.
forms the most superficial layer of lateral abdomen, contrlateral roatation of waist, maintains posture, movement of vertebral column
Describe the tranverse abdominus muscle.
Deep abdominal muscle with horizontal fibers, compress abdominal contents, posture, does not move vertebral column.
Describe the internal oblique muscle.
between the external oblique and transverse, ipsilateral rotation of waist, movement of vertebral column.
Describe the latissimus dorsi muscles.
large paired superficial muslces of the lower back, one of two muslces in the axial group that acts on the humerus
What two muslces form the axial group that acts on the humerus?
Latissimus dorsi and pectoralis major
Describe the trapezius muscle.
broad muscle of upper back that allows you to extend your head, it also helps stabalize the scapula and shoulder during arm movements
Describe the deltoid muscle.
Thick triangular muscle that caps the shoulder and forms the shoulder mass. involved in arm swinging
What are the STIS muscles?
supraspinatus, infraspinatus, teres minor, subscapularis and they are the 4 muscles of the rotator cuff musculature
What is the erector spinae muscle and what are its components?
muscle that forms t-bones and prok chops, it runs from the cranium to the sacrum, its 3 components are the illiocostalis, longissimus, and spinalis
Describe the flexor digitorum superficialis muscle.
on anterior of forearm, flexes wrist, its tendons pass through the carpal tunnel
What two muscles resist the separation of radius and ulna in pushups.
pronator quadratus and flexor digitorum profundes
Describe the triceps brachii muscle.
muscle that acts on (helps extend) the elbow, has 3 heads (long lateral and medial), and it adducts the humerus
Describe the biceps brachii muscle.
forms anterior bulge on the arm and helps stabilize the shoulder joint, it is a elbow flexor that is also a forearm supinator
Describe the extensor digitorum superficialis muscles.
extends wrist, tendons canbe seen on the back of the hand when fingers are strongly extended.
The tendons of these muscle can be felt as prominent cords on both sides of the popliteal fossa.
biceps femoris, semitendonous, semimembranous (AKA hamstirng muscles)
Describe the sartorius muscle.
Longest muscle in the body, strap like muscle that is a weak thigh flexor (tailor's muscle)
What muscles make up the quadriceps?
rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius, they are a muscle group that extend the knee
What are the hamstring muscles and what do they do?
biceps femoris, semitendenous, semimembranous. extend the thigh and flex the knee
Describe the gastrocnemius muscle.
"toe dancer's muscle", 2 bellied muscle of the calf, plantar flexor
Describe the gluteus maximus muscle.
Makes up the bulk of the buttock, used to extend the hip while climbing stairs