Nerve and Blood Supply of Upper Extremities

8/8/2019 Nerve and Blood Supply of Upper Extremities

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Nerve & Blood SupplyNerve & Blood Supplyof the Upperof the UpperExtremitiesExtremities

Reynaldo V. Lopez, M.D.Senior Lecturer

Department of Anatomy

Angeles University

School of Medicine


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Shoulder JointShoulder Joint

All of the nerves that traveldown the arm pass throughthe axilla (the armpit) justunder the shoulder joint.


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Elbow JointElbow Joint

All of the nerves that travel down the arm pass across theelbow.


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Wrist JointWrist Joint

All of the nerves that travel to the hand cross the wrist.


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The radial nerve runs along thethumb-side edge of the forearm.

It wraps around the end of the

radius bone toward the back of thehand.

It gives sensation to the back ofthe hand from the thumb to the

third finger. It also goes to the back of the

thumb and just beyond the mainknuckle of the back surface of thering and middle fingers.


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The median nerve travelsthrough a tunnel within the

wrist called the carpal tunnel.

The median nerve givessensation to the palm sides ofthe thumb, index finger, longfinger, and half of the ring

finger.

It also sends a nerve branch tocontrol the thenar muscles ofthe thumb.


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The ulnar nerve travels through aseparate tunnel, called Guyon'scanal.

This tunnel is formed by twocarpal bones (thepisiform andhamate), and the ligament thatconnects them.

After passing through the canal,the ulnar nerve branches out to

supply feeling to the little fingerand half the ring finger.

Branches of this nerve also supplythe small muscles in the palm andthe muscle that pulls the thumbtoward the palm.


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Arteries of theArteries of the ShoulderShoulder

Traveling along with the

nerves are the large vessels

that supply the arm with

blood.

The large axillary artery

travels through the axilla.

The axillary artery has

many smaller branches thatsupply blood to different

parts of the shoulder.

The shoulder has a very

rich blood supply.


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Arteries of theArteries of the ElbowElbow

Traveling along with thenerves are the large vessels

that supply the arm with

blood.

The largest artery is thebrachial arterythat travels

across the front crease of

the elbow.

The brachial artery splits

into two branchesjust belowthe elbow: the ulnar artery

and the radial arterythat

continue into the hand.


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Arteries ofArteries of the Wristthe Wrist

Traveling along with the nerves are the large vessels thatsupply the hand with blood.

The largest artery is the radial arterythat travels across the

front of the wrist, closest to the thumb.

The radial artery is where the pulse is taken in the wrist.


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Arteries ofArteries of the Wristthe Wrist

The ulnar arteryruns next to the ulnar nerve throughGuyon's canal .

The ulnar and radial arteries arch together within the palm of

the hand, supplying the front of the hand and fingers.


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Major Veins of the Systemic CirculationMajor Veins of the Systemic Circulation

Nerve and Blood Supply of Upper Extremities

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