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MEDSCI 201 > Lecture 14: The upper limb 3- Arm and Elbow > Flashcards

Lecture 14: The upper limb 3- Arm and Elbow Flashcards

1
Q

What is the arm?

A

everything from the shoulder to elbow

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2
Q

what are the three anterior muscles of the arm?

A

1) coracobrachialis
2) bicep brachii
3) Brachialis

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3
Q

“a lady lies between two majors” - explain this.

A

It describes the insertion of the three muscles:

  • Medial lip of intertubercular groove: teres major
  • “floor” of intertubercular groove: Latissimus dorsi
  • Lateral lip of the intertubercular: Pectoralis major
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4
Q

Where does the tendon for long head bicep brachii run?

A

Intertubercular groove

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5
Q

deltoid tuberosity is on the _______ side of humerus

A

lateral

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6
Q

coracobrachialis inserts into the ______ side of humerus

A

medial

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7
Q

What are the two septa that seperate the flex and extensor compartments of the arms.

A

lateral intermuscular septa and medial intermuscular septa

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8
Q

What ligament runs over the long head of biceps brachii at the proximal end of the humerus?

A

Transverse humeral ligament

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9
Q

What are the origin and insertion of the long head bicep brachii muscle?

A

origin: front
Insertion:

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10
Q

What are the origin and insertion of the long head bicep brachii muscle?

A

Origin: Supraglenoid Tubercle
Insertion: Radial Tuberosity and bicipital aponeurosis

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11
Q

What are the origin and Insertion of short head biceps brachii muscle?

A

Origin: Coracoid process
Insertion: Radial tuberosity and bicipital aponeurosis

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12
Q

What is the main function of the bicep brachii?

A

The first function it does is act as a SUPINATOR then it is a ELBOW FLEXOR

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13
Q

What are the origin and insertion of the brachialis?

A

Origin: Front of humerus, including the intramuscular septa
Insertion: Ulna tuberosity

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14
Q

What is the main function of the brachialis?

A

its only job is to flex the elbow. The bones wont allow it to do anything else

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15
Q

What is the origin and insertion of the coracobrachialis muscle?

A

Origin: coracoid process
Insertion:half way down on the medial aspect of the humerus (on the roughhead)

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16
Q

Biceps can only ____ the elbow if the arm is in a ______ position (that why its the biceps first priority)

A

Flex; supinated

17
Q

What muscle is activated to flex the elbow in a pronated position?

A

coracobrachialis

18
Q

What is the origin and insertion of the tricep brachii?

A

Origin: long head is the infraglenoid tubercle and lateral and medial are the posterior surface of humerus
Insertion: olecranon

19
Q

how many heads of triceps are there?

A

lateral head; long head; medial head

20
Q

What is the main function of the tricep brachii?

A

long head is responsible for extension and adduction of the arm at the glenohumeral joint

21
Q

What is a shunt muscle? and what are some examples?

A

muscle that prevents dislocation of the joint during load.

deltoid, short head bicep, coracobrachialis, long head tricep

22
Q

On the anterior view, there are 2 fossas. What are they?

A

Radial and coronoid

23
Q

What are the bone structures responsible for the humero-ulnar joint?

A

Trochlea on the humerus and the trochlea notch on the ulna.

24
Q

What is the trochlear notch made up of?

A

olecranon and coronoid process

25
Q

What are the bone structures of the humero-radial joint?

A

capitulum on the humerus and superior surface of the radius

26
Q

What are the bone structures of the superior radio-ulnar joint?

A

radial notch on ulnar and head of radius

27
Q

what joints are involved in flexion and extension of elbow?

A

humero-ulna and humero-radius

28
Q

What joints are involved in pronation and supranation of elbow?

A

humero-radial and superior radio-ulna

29
Q

the only bone that rotates in the arm is the ______

A

radius

30
Q

there are three ligaments in the elbow joint. what are they?

A

radial collateral ligament
anular ligament of radius
ulnar collateral ligament

31
Q

Whats the purpose of the anular ligament of radius?

A

To allow radius to rotate

32
Q

whats the origin and insertion of the anular ligament?

A

Origin: radial notch
Insertion: radial notch

33
Q

Whats the purpose of the ulnar collateral ligament?

A

prevents abduction of the forearm bones (ulna)

34
Q

whats the purpose of the sacciform recess?

A

allows the radius to rotate

35
Q

What fossa does the fat pads fill up on the elbow joint?

A

radial and coranoid

MEDSCI 201 (7 decks)

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