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WorksheetsNerves and Plexus
Total questions: 33
Worksheet time: 23mins
The brachial plexus consists of the ventral rami of the following:
C4, C5, C6, C7, T1
C5, C7, C8, C9, C10
C5, C6, C7, C8, T1
C6, C7, C8, T1, T2
Identify the correct statements:
Lateral wall of axilla is mostly mostly bone, the radius + ulna.
Medial wall of axilla runs against the serratus anterior and thoracic cage.
Anterior wall of axilla is mostly the pectoralis major and pectoralis minor.
Lateral wall of axilla is mostly bone, the humerus.
Medial wall of axilla runs obliquely to the clavicle.
This groove in the humerus, sits in between the greater and lesser tuberosities.
Tubercular groove
Tuborositous groove
Intertubercular groove
Intertubated groove
The apex of the axilla is behind the _________.
angle of Louis
sternum
scapula
clavicle
Which best describes a plexus?
an intermingling of dorsal rami nerve fibers
an intermingling of ventral rami nerve fibers
an intermingling of dorsal root ganglions
an intermingling of sympathetic chain fibers
What best describes the end result of the intermingling of ventral rami nerve fibers in a plexus?
The peripheral nerves can now converge into the sympathetic chain ganglia.
Each peripheral nerve now has it's own blood supply.
The peripheral nerves now can innervate muscles over a longer distance.
Each peripheral nerve now contains fibers from several ventral rami.
Several muscles may receive fibers from a single ventral root.
True
False
Which nerves contain axons from C5, C6, C7, C8, and T1.
Musculocutaneous nerve
Axillary nerve
Radial nerve
Median nerve
Ulnar nerve
Which nerves contain axons from C5, C6, and C7?
Musculocutaneous nerve
Axillary nerve
Radial nerve
Median nerve
Ulnar nerve
Which nerves contain axons from C7, C8, and T1?
Musculocutaneous nerve
Axillary nerve
Radial nerve
Median nerve
Ulnar nerve
Which best describes the composition of the brachial plexus (in the direction of the arrow)?
Terminal branches -> 3 trunks -> 3 anterior and posterior division -> 3 cords -> 5 ventral roots
5 ventral roots -> 3 anterior and posterior divisions -> 3 trunks -> 3 cords -> terminal branches
5 ventral roots -> 3 trunks -> 3 anterior and posterior divisions -> 3 cords -> terminal branches
5 ventral roots -> 3 cords -> 3 anterior and posterior division -> 3 trunks -> terminal branches
Which numbers identify POSTERIOR divisions?
3, 4, 5
1, 2, 6
1, 4, 6
3, 4, 6
Which is the MEDIAL cord?
1
2
3
In the brachial plexus, what separates the anterior and posterior divisions?
lateral divisions
subscapular vein
long thoracic nerve
axillary artery
The radial and ulnar nerves branch from the posterior cord.
True
False
How many collateral branches did we learn?
15
8
18
11
This nerve will arise from C5 and innervate the levator scapulae, rhomboid minor, and rhomboid major.
Suprascapular nerve
Long thoracic nerve
Dorsal scapular nerve
Thoracodorsal nerve
This nerve will innervate the 2 rotator cuff muscles, the supraspinatus muscle and the infraspinatus muscle.
Suprascapular nerve
Long thoracic nerve
Dorsal scapular nerve
Thoracodorsal nerve
The long thoracic nerve runs along the ___________ surface of the serratus anterior.
Anterior
Posterior
Injury to the long thoracic nerve could cause:
Paralysis of serratus anterior
Winged scapula
Pinched lung
Pain along 1st rib
This nerve will innervate the latissmus dorsi.
Suprascapular nerve
Long thoracic nerve
Dorsal scapular nerve
Thoracodorsal nerve
The medial pectoralis nerve innervates the pectoralis major and the pectoralis minor.
True
False
_________ is a synonym for forearm.
Brachial
Antebrachial
Subbrachial
Brachialis
The medial brachial cutaneous nerve is strictly motor function.
True
False
The first part of the axillary artery is _______ the pectoralis minor.
above
below
under
The "musculo" component of the musculocutaneous nerve innervates the following muscles:
coracobrachialis
brachialis
both heads of the biceps
subscapularis
deltoid
What nerve supplies sensation to the skin highlighted blue?
Musculocutaneous nerve
Median nerve
Ulnar nerve
Radial nerve
What nerve supplies sensation to the skin highlighted blue?
Musculocutaneous nerve
Median nerve
Ulnar nerve
Radial nerve
Injury to what nerve would be responsible for a patient not being able to abduct their arm beyond 15 degrees and feeling numbness of the skin on the lateral aspect of the shoulder.
Musculocutaneous
Median
Ulnar
Axillary
What separates flexor compartment and extensor compartment in the upper arm?
intermuscular septum
interosseous membrane
deep fascia
lateral fascia
What structures serve as borders for the axillary artery?
lower border of the clavicle and the lower border of pectoralis minor
lower border of the clavicle and the subscupular artery
lower border of 1st rib and the lower border of teres minor
lower border of 1st rib and the lower border of teres major
What names are all applicable to the same blood vessel at different locations?
subclavian artery
axillary artery
brachial artery
innominate artery
The subscapular artery is a branch of which division of the axillary artery?
1st division
2nd division
3rd division
