quiz 3 Flashcards
What is the space between the arm and chest wall, which is in the shape of a truncated pyramid
Axilla
What space is an important passage way between the upper extremity and the neck ?
Axilla
The nerves that are about to enter the upper extremity come together to form a nerve plexus known as
Brachial plexus
Where are Brachial Plexus derived from
the upper extremity within the axilla. They come together to form a neve plexus.
What allows the nerve fibers derived from different segments of the spinal cord to be arranged and distributed efficiently in different nerve trunks to various parts of the upper extremity?
Brachial Plexus
What are the five spinal nerves that form a normal brachial plexus?
C5,C6,C7,C8 and T1
What is the upper trunk of brachial plexus formed by ?
Union of C5 and C6
What is the middle trunk of the brachial plexus formed by?
C7 alone
What is the lower trunk of the brachial plexus formed by ?
Union of C8 and T1
How is each trunk of brachial plexus divided ?
Anterior and posterior
What is the lateral cord of the brachial plexus formed from
Fusion of the anterior division of the upper and middle trunk ; contains fibers form C5,C6,C7.
What is the medial cord of the brachial plexus formed from
anterior division of the lower trunk; contains fibers from C8 and T1.
What is the posterior cord of the brachial plexuses formed from?
Posterior division of all three cords, contains fibers from C5, C6,C7,C8 and T1
How are the cords of the brachial plexus named ?
To show their relationship to the axillary artery.
What neve descends down the back, deep to the rhomboid major and minor and the levator scapular muscles.
Dorsal scapular nerve.
What is the dorsal scapula nerve segmental innervation?
C5
What nerve descends posteriorly from the spinal nerves and form the plexus to the anterior lateral aspect of the thoracic cage ?
Long thoracic nerve
What is the long thoracic nerves segmental innervation ?
C5,C6,C7
What is the long thoracic nerves motor supple
Serratus anterior
What passes laterally across the cervical region (deep to the trapezius) and deep to the muscle associated with the posterior aspect of the scapula
Suprascapular nerve
How does the suprascapular nerve pass from the supraspinatus fossa to the infraspinatus fossa
An opening in the spine of the scapula
What is the suprascapular nerves segmental innervation?
C5 and C6
What is the suprascapular neve motor supple
Supraspinatus and infraspinatus
What is the suprascapular supply
Shoulder joint (glenohumeral joint)
What is the nerve to the subclavius segmental innervation?
C5 and C6
What is the nerve to the subclavian motor supply ?
Subclavius and diaphragm.
What is the nerve to the subclavius articular supply
Sternoclavicular joint
What nerve is the first nerve to come off the lateral cord
Lateral pectoral nerve
What is the lateral pectoral nerves segmental innervation?
C6, C6, and C7
What is the lateral pectoral nerve’s motor supply
Pectoralis major
What nerve leaves the axilla and passes though the belly of the coracobrachialis muscle and then runs between the biceps brachaii and brachialis muscle, then continues into the forearm as the lateral antebrachial cutaneous nerve
Musculocutaneous Nerve.
What is the musculocutaneous nerves segmental innervations
C5, C6 and C7
What is the musculocutaneous nerve motor supply?
Corabrachialis, biceps brachii and brachialis
What is the musculocutaneous nerves articular supply?
Elbow Joint
What is the musculocutaneous nerves supply
Lateral aspect of the forearm
What is the suprascapular nerve’s motor supply?
Shoulder Joint ( glenohumeral Joint)
What nerve descends down the back, deep to the rhomboid and levator scapula muscles
Dorsal Scapular nerve
What is the dorsal Scapular nerves segmental innervation?
C5
What is the dorsal scapular nerve’s motor supply?
Rhomboid Major, rhomboid minor and levator scapular
What is the articular supply to the Acromioclavicular joint?
Doral scapular nerve
What nerve Descends posteriorly from the spinal nerves and forms the plexus to the anterior lateral aspect of the thoracic cage
Long thoracic nerve
What is the long thoracic nerves segmental innervation?
C5, C6 and C7
what nerve passes laterally across the cervical region( deep to the trapezius) and deep to the muscles associated with the posterior aspect of the scapula?
Suprascapular nerve
How does the suprascapular nerve pass from the supraspinatus fossa to the infraspinatus fossa?
An opening in the spine of the scapula
What is the suprascapular nerves segmental innervation?
C5 and C6
What is the suprascapular nerve’s motor supply
supraspinatus and infraspinatus
What is the suprascapular nerve’s articular supply
Shoulder joint ( glenohumeral joint )
What nerve descends posteriorly to the clavicle
nerve to the subclavius
What is often given a branch to the phrenic nerve which is known as the accessory phrenic nerve?
Nerve to subclavius
What is the nerve to the subclavius segmental innervation
C5 and C6
What is the nerve to the subclavius motor supply
Subclavius and diaphragm
What is the nerve to the subclavius articular supply?
Sternoclavicular joint
What nerve is the first nerve to come off of the lateral cord
Lateral pectoral nerve
What is the lateral pectoral nerves segmental innervation?
C5, C6 and C7
What is the lateral pectoral nerves motor supple
Pectoralis major
What nerve leaves the axilla and passes through the belly of the coracobrachialis muscle and then runs between the biceps brachii and brachialis muscle, then continues into the forearm as the lateral antebrachial cutaneous nerve.
Musculocutaneous nerve
what is the musculocutaneous nerves segmental innervation?
C5,C6, C7
What is the musculocutaneous nerve’s motor supply
coracobrachialis, biceps brachii and brachialis
What is the musculocutaneous nerve’s articular supply ?
Elbow joint
What is the musculocutaneous nerves cutaneous supply
Lateral aspect of the forearm ?
What nerve is the first nerve to come off of the medial cord
medial pectoral nerve
What is the medial pectoral nerves segmental innervation?
C8 and T1
What is the medial pectoral nerves motor nerves motor supply?
pectoralis major and pectoralis minor
What is the medial brachial cutaneous nerve’s segmental innervations?
T1
What is the medial brachial cutaneous nerves cutaneous supply?
Medial aspect of them arm
What is the medial antebrachial cutaneous nerves segmental innervation?
C8 and T1
What is the medial antebrachial cutaneous nerves cutaneous supply
medial aspect of the forearm
What is the ulnar nerves segmental innervation?
C8 and T1
What is the ulnar nerves motor supply?
Flexor Carpi ulnaris, half of the flexor digitorum profundus
muscles associated with the fifth digit, which are collectively known as the hypothenar muscles
What is the ulnar nerves articular supply
Elbow and wrist joints
What nerve is the only branch of the brachial plexus which is formed from more than one cord ( lateral and medial)
Median nerve
What is the median nerves segmental innervation?
C6,C7,C8 and T1 (not C5)
What is the median nerves motor supply ?
Most of the muscles of the anterior fora
