Neurology Flashcards
Median nerve roots
C6-T1
Roots of ulna nerve
C8-T1
Nerve roots and muscles innervated by Long Thoracic Nerve
C5-C7
Serratus Anterior
Nerve roots and muscles innervated by suprascapular nerve
C5-6
Supraspinatus & Infraspinatus
Claw hand is a result from damage to what nerve
Ulna nerve
Roots of musculocutaneous
C5-6
Nerve roots of Radial Nerve
C5-T1
Muscles innervated by Radial Nerve
Triceps brachii
Anconeus
Brachioradialis
Extensor carpi radialis longus
Nerve roots of Axillary nerve
C5&6
Name the borders of the Quadrangular space
Inferior border of subscapularis
Teres major
Long head of triceps
Surgical neck of humerus
Nerve roots and muscles innervated by Subscapular Nerve
C5-6
Subscapularis & Teres Major
Which dermatome innervates the skin over the thumb
C6
Nerve roots and muscles innervated by dorsal scapular Nerve
C5
Both rhomboids & Levator scapula
What is the presenting symptom of Median Nerve Palsy
Inability to flex distal interphalangeal joint of 2nd digit
&
Inability to flex digit 2 and 3 into a fist
What muscles does the brachial plexus emerge between
Anterior and middle scalene
Describe the pathway of Musculocutaneous Nerve
Enters coracobrachialis
exits lateral aspect of coracobrachialis
Travels between biceps brachii and Brachialis
Exits lateral to biceps tendon and gives off lateral cutaneous nerve of forearm
What is ERB Duchanne Palsy
Injury to C5-6
Results in;
Flexion of fingers
Internal shoulder rotation
Over pronation of forearm/wrist
Define Myotome
Skeletal muscle tissue innervated by a single pair of spinal nerves
What spinal nerve is responsible for lateral rotation of humerus
C5
What spinal nerve is responsible for medial humeral rotation
C6-8
Describe the course of the Axillary Nerve and it’s innervations
Arises from posterior cord
Enters quadrangular space
Wraps around surgical neck of humerus
Gives off upper lateral cutaneous nerve
Innervates:
Deltoid, teres minor, glenohumeral joint
What is badge patch anaesthesia ?
Damage to Axillary Nerve
Lack of sensation over badge patch of upper arm
Describe the course of the Radial Nerve
Arises from posterior cord
Descends posterior to the brachial artery
then passes posteriorly between the long and medial heads of triceps brachii
Divides anterior to lateral epicondyle into deep and superficial branches
Deep branch pierces supinator
Superficial remains lateral and innervates the skin of forearm
Describe the course of the median nerve
Arises from medial and lateral cords
Arises lateral to brachial artery, crossed it distally to become medial
Superficial to brachialis and deep to bicipital appneurosis in cubital fossa
Travels between pronator teres heads
Travels along Flexor Digitorum Superficialis
Becomes superficial 5cm proximal to carpal tunnel
Gives off branches in the hand
Describe the course of the ulna nerve
Arises from medial cord
Descends medial to brachial artery
Enters forearm between heads of flexor carpi Ulnaris
Descends forearm on the superficial, medial surface of flexor digitorum profundus
Under palmaris brevis
Name the borders of the cubital fossa
Lateral border: medial border of brachioradialis
Medial border: lateral border of pronator teres
Superior border: hypothetical line between epicondyles of humerus
Name the floor of the Cubital Fossa
Proximal: brachialis
Distal: supinator
What are the contents of the Cubital Fossa
Hint: BBRM
Biceps brachii tendon
Brachial artery
Radial Nerve
Median nerve
What spinal nerves are responsible for adduction of humerus
C6-8
What spinal nerves are responsible for abduction
C5
What spinal nerves are responsible for humeral extension
C6-8
What spinal nerves are responsible for humeral flexion
C5
