lesson 20 Flashcards
what are the four heads of the quadriceps femoris?
and where do they all insert on?
rectus femoris
vastus lateralis
vastus medialis
vastus intermedius
inserts on the TIBIAL TUBEROSITY indirectly via patellar ligament
What are the attachment sites/ORIGIN of rectus femoris?
Anterior inferior iliac spine
What are the attachment site/origin for vastus lateralis?
lateral lip of linea aspera
what is the attachment site/ origin for vastus medialis?
medial lip of linea aspera
what is the attachment site/origin of vastus intermedius ?
anterior surface of shaft of femur
Which joint or muscle does the rectus femoris cross?
- hip joint
- knee joint
what joint does vastus lateralis cross?
knee joint
what joint is the vastus medialis crossing?
knee joint
what joint is the vastus intermedius crossing?
knee joint
what is the class and type of the hip joint
synovial ball-and-socket
What is the class and type of the knee joint?
synovial (modified hinge)
what are the movements permitted by the hip joint?
- flexion/extension
-abduction/adduction
-medial/lateral rotation
-circumduction
what is the movements permitted by the knee joint?
-flexion/extension
The intrinsic shoulder muscles function to cause movement at the glenohumeral joint (shoulder joint), how many planes can this joint permit action within?
and what actions can the glenohumeral joint permit?
- saggital
- frontal
- transverse
- sagittal- flexion/extension
- frontal- abduction/adduction
- transverse- medial/lateral rotation
ALL of these things this means it also circumduction
what are the six intrinsic shoulder muscles or also known as the scapulohumeral muscles?
- deltoid
- Teres major
ROTATOR CUFF MUSCLES?
3. supraspinatus
4. infraspinatus
5. teres minor
6. subscapularis - CANT SEE ON THE BACK SIDE
Where does the deltoid originate and insert?
Its origin is the bony horseshoe:
– lateral 1/3 of the clavicle
-acromion
- the spine of the scapula
Insertion:
deltoid tuberosity of humerus
What are the three heads that the deltoid is divided into? and what are the actions of each one? and what nevrve innervated this muscle?
- anterior (clavicular) part
- Middle (acromial) part
- posterior (spinal) part
overall it resists inferior displacement of the humerus
stabilize the glenohumeral joint
axillary nerve
where does teres major originate and insert from?
Originates:
The lateral border of the scapula, inferior aspect
Insertion:
the medial lip of the intertubercular groove
back to front muscle originates posteriorly inserted anteriorly
where does latissimus dorsi insert?
floor of the intertubercular groove
what is the actions of the teres major? and what nerve innervated this muscle?
stabilize the glenohumeral joint
- adduction of the humerus
- medial rotation of the humerus
- extension of humerus from a flexed position
innervation:
lower subscapular nerve
where does the rotator cuff muscle supraspinatus originate and insert from?
Originates:
supraspinous fossa
inserts :
on the superior facet of greater tubercle
What are the actions of the supraspinatus muscle (top to top muscle)? and what nerve innervates this muscle?
abduction of the humerus
stabilize the glenohumeral joint
suprascapular nerve
this is the only muscle that has no rotation
where the the rotator cuff muscle : infraspinatus originate and insert from?
orginates from the infraspinous fossa
insertes: from the middle facet of the greater tubercle
what are the actions and what nerve innervated the infraspinatus muscle?
actions:
lateral rotation of the humerus
-stabilize the glenohumeral joint
Innervation:
suprascapular nerve
where does the rotator cuff muscle: teres minor originate and insert from?
originates:
lateral border of the scapula
and inserts: inferior facet of greater tubercle
what are the actions and what nerve innervates teres minor?
actions:
lateral rotation of the humerus
stabilize glenohumeral joint
innervation:
axillary nerve
where does the rotator cuff muscle: subscapularis originate and insert from?
originates: from the subscapular fossa and inserts from the lesser tubercle of humerus
what are the actions and what nerve innervates the subscapularis muscle (front to front)?
medial rotation of the humerus
stabilize glenohumeral joint
it innervated:
upper subscapular nerve
lower subscapular nerve
what are the key things to note about the suprascapular artery and the suprascapular nerve?
the artery is above the foramin where the scapular notch is
and the vein travels through the foramin
what are the different compartments of the arm?
what are the two heads of the biceps ?
long head
short head
what is the bicipital aponeurosis
- anchor the muscle to a site but rather than a osteological site it anchors it to fascia
where does the long head, and the short head of the biceps brachii originate from and insert?
LH: supraglenoid tubercle of the scapula
SH: Coracoid process of the scapula
Insertion:
-radial tuberosity
- deep fascia of forearm
what are the actions of the biceps brachii the long head and short head, and what is the innervation?
- flexion at the glenohumeral (shoulder) joint
-stabilizes glenohumeral (shoulder) joint - supination of the forearm
- flexion at the elbow joint (when in supinated position)
Innervation:
musculocutaneous nerve
where do you find coracobrachialis?
deep to the biceps it attached to the short head of the brachii
Where is the origin and the insertion of coracobrachialis?
origin the coracoid process of scapula
and the insertion:
- middle 1/3 of humerus, medial aspect
what are the action and what innervated the coracobrachialis?
stabilize glenohumeral (shoulder joint)
flexion at the glenohumeral (shoulder) joint
flexion at the glenohumeral (shoulder) joint
adduction at the glenohumeral (shoulder) joint
innervation: musculocutaneous nerve
where the the origin and the insertion of brachialis?
origin:
Distal half of humerus, anterior surface
Insertion:
coronoid process of ulna
ulnar tuberosity
what are the actions and the innervation of brachialis?
flexion at the elbow joint
innervation: musculocutaneous nerve
what is the pathway of the musculocutaneous nerve?
- pierce through coracobrachialis
innervates that muscle - travels deep into the biceps brachii
and superficial to brachialis - exits lateral to distal aspect of biceps brachii
- terminates at the lateral cutaneous nerve of the forearm
the posterior compartment of the arm consists of what?
triceps brachii
-three heads
long head
lateral head
medial head
where is the origin of the long head, the lateral head, and the medial head and what is the insertion site for all of these?
Long head: infraglenoid tubercle of scapula
lateral head: posterior surface of the humerus, superior to the radial groove
medial head: posterior surface of the humerus, inferior to the radial groove
insertion: olecranon process of ulna
what are the actions and the innervation of triceps brachii, long head?
extension at the elbow joint
long head:
Extension at the shoulder joint
-stabilize the shoulder joint
innervation: radial nerve
what is the route of the axillary nerve?
in the quadrangular space it is bounded by:
teres minor- superiorly
teres major- inferiorly
triceps brachii: long head- medially
triceps brachii: lateral head - laterally
it innervates: DELTOID and Teres major
what is the route of the radial nerve but also tell me what is the muscular boundaries: triangular interval
triangular interval:
bounded by:
teres major- superiorly
triceps brachii: long head-medially
triceps brachii: lateral head- laterally
innervates the posterior (extensor) compartment of the arm:
- triceps brachii
