Annular ligament collateral ligaments coracoacromial

Annular ligament
Collateral ligaments
Coracoacromial ligament
Flexor retinaculum
Rotator cuff muscles
Which of the following joints is a hinge joint?
Acromioclavicular joint
Carpometacarpal joint of the thumb
Glenohumeral joint
Proximal interphalangeal joint of the thumb
Sternoclavicular joint
Muscles upper EX
Which muscles in the forearm flex the fingers and thumb?
-
flexor digitorum superficialis - flexor digitorum profundus - flexor pollicis longus

Innervations upper Ex
What are the functions of autonomic nerves in the upper extremity?
-
supply the blood vessel smooth muscle and also control sweat glands and piloerection
Which spinal levels give rise to the brachial plexus?
-
C5-T1
Which nerves supply upper arm motion and emerge from brachial plexus cords?
The medial and lateral pectoral, axillary, upper subscapular, thoracodorsal, and
lower subscapular nerves
What is the action of the dorsal interosseous muscles?
-
abduct the fingers
Which nerve supplies sensation to the lateral surface of the forearm
-
Musculocutaneous nerve
A patient comes to the hospital after being stabbed between the fourth
and fifth ribs, at the right mid-axillary line. When the patient is asked
to press against the wall with their arms, the right scapula protrudes
from the back. Which of the following nerves is most likely injured?
Long thoracic nerve
Median nerve
Musculocutaneous nerve
Radial nerve
Ulnar nerve
Which of the following nerves originates from the medial cord of the
brachial plexus?
Long thoracic nerve

Median nerve
Musculocutaneous nerve
Upper subscapular nerve
Explanation: Spinal nerves emerge from the spinal cord containing sensory, motor,
and sympathetic autonomic fibers, which will supply the upper extremity. Although
parasympathetic nerves are important in many parts of the body (heart, aorta), they
are not important in the muscles of the extremities.
Which of the following structures are most distal in the brachial
plexus?
Branches
Cords
Divisions
Roots
Trunks

A 27-year-old man is brought to the emergency department after falling off a ladder from
the height of the roof. An x-ray of the patient’s right arm is shown.
Which of the following neurologic deficits is most likely to occur as a result
of his fracture?
A A protruding scapula
B Inability to abduct the arm fully
C Inability to hold a piece of paper between the fingers
D Pain over the palmar aspects of the first three and a half digits
E Weakness in wrist extension
Explanation: Midshaft fractures of the humerus can cause radial nerve injury.
Radial nerve injury results in “wrist drop,” which is weakness in wrist extension.
----------------------------------------------------------------------------------------------------------------------------------
A 10-year-old boy is brought to the pediatrician with a 4-day history of fever, fatigue, and right
shoulder pain. His temperature is 38.6°C (101.5°F). On physical examination, he has right shoulder
tenderness, worse at the right axillary region, and painful and weak abduction. On palpation, a
swollen mass in the axillary region is noted. He also has wrist-extension weakness and triceps