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Individual Histology > L7 MS > Flashcards

L7 MS Flashcards

1
Q

What is formed when ventral rami in certain areas of the spinal cord tend to join and divide in complex patterns?

A

Nerve plexus

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2
Q

What are the five different sections of the brachial plexus?

A

Roots, Trunks, Divisions, Cords, Branches

Mnemonic: Reach To Drink Cold Beer

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3
Q

What are the three trunk division of the brachial plexus?

A

Upper (C5, C6)
Middle (C7)
Lower (C8, T1)

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4
Q

What are the two divisions of the brachial plexus? How does each trunk contribute to the two divisions?

A

Anterior division and Posterior division.
Each trunk contributes to the two divisions
Upper Middle Lower —> Anterior
Upper Middle Lower —> Posterior

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5
Q

What are the three cords of the brachial plexus? What are they named in relation to?

A

Lateral, Medial, and Posterior

These three are named according to position relative to the axillary artery

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6
Q

How many branches does each cord split into? What are they?

A

Two branches each.
Lateral splits into the musculocutaneous branch
Medial splits into ulnar branch
Both Lateral and Medial contribute to the median branch
The posterior cord splits into the Axillary and Radial nerves

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7
Q

Which branch has contributions from two different cords?

A

Median nerve has contributions form the lateral and medial cords

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8
Q

What are the five branches of the BP?

A 
Musculocutaneous
Axillary
Median
Radius
Ulnar
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9
Q

Which roots contribute to the musculocutaneous nerve?

A

C5, C6, C7

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10
Q

How many total branches are contributed by the medial and lateral cords? What are they?

A

Three.
Musculocutaneous
Medial
Ulnar

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11
Q

What are the two branches contributed by the posterior cord?

A

Axillary

Radial

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12
Q

Which cords contribute one and a half branches each?

A

Lateral and medial

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13
Q

C5, C6, C7 contribute to what branch of the BP?

A

Musculocutaneous

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14
Q

C5 and C6 contribute to what branch of the BP?

A

Axillary

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15
Q

Which branch receives contributions from all the roots of the BP?

A

Radial (some say Median too)

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16
Q

Which roots contribute to the ulnar branch of the BP?

A

(C7), C8 and T1

17
Q

Which roots contribute to the Median branch of the BP?

A

(C5), C6, C7, C8, T1

18
Q

C8 and T1 cotribute to what branch of the BP?

A

Ulnar

19
Q

Which branch receives contributions from C5, C6, C7, and C8?

A

Radial (some say Median too)

20
Q

What muscles does the Axillary nerve innervate?

A

Deltoid, Teres minor, Superior lateral brachial cutaneous

21
Q

What muscles does the Musculocutaneous innervate?

A

Carocobrachialis, Biceps Brachii, Brachialis, Lateral antebrachial cutaneous

22
Q

What muscles does the radial innervate?

A

13 muscles of the posterior arm and forearm
Lateral brachial cutaneous
Posterior antebrachial cutaneous

23
Q

What muscles does the Median innervate?

A

Flexor muscles of the forearm and a few hand muscles.

Lateral cutaneous area of hand

24
Q

What muscles does the ulnar innervate?

A

Hand muscles,

Skin of hand

25
Q

What nerves come off of the roots of the BP? What do they innervate?

A

Dorsal scapular innervates: Levator scapulae, and both major and minor Rhomboids
Long thoracic innervates: Serratus anterior

26
Q

What nerves come off of the trunks? What do they innervate?

A

Suprascapular and Nerve to Subclavius.
Suprascapular: Supraspinatus, Infraspinatus muscles
Nerve to Subclavius: Subclavisu muscle

27
Q

What nerves come off of the cords of the BP?

A

Medial/Lateral Pectoral
Thoracodorsal
Upper/Lower Subscapularis
Medial Brachial/Antebrachial Cutaneous

28
Q

What nerves form the branches of the BP?

A 
Musculocutaneous
Axillary
Median
Radial
Ulnar
29
Q

What muscles does the medial/lateral pectoral innervate?

A 
Pectoralis minor (med/lat)
Pectoralis major (only lat)
30
Q

What muscle does the thoracodorsal innervate?

A

Latissimus Dorsi

31
Q

The subscapularis is innervated by what two nerves?

A

Upper and lower subscapular nerve

32
Q

What muscles does the lower subscapular nerve innervate?

A

Subscapularis muscle and teres major

33
Q

T/F The Upper Subscapular nerve innervates the subscapularis and teres major muscles

A

FALSE. it only innervates the subscapularis. The lower subscapular, however, does innervate both of those muscles

34
Q

What muscles does the musculocutaneous nerve innervate?

A

Coracobrachialis, Biceps, brachialis

35
Q

What muscles does the axillary nerve innervate?

A

Deltoid and teres minor

36
Q

What muscles does the median nerve innervate?

A

Flexors of the forearm

37
Q

What muscles does the radial nerve innervate?

A

Extensors of forearm, Triceps, anconeus,

38
Q

What nerve innervates the muscles of the hand?

A

Ulnar

Individual Histology (10 decks)

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