Anatomy of the Arm: Cubital Fossa and its Contents, Exercises of Anatomy

Download Anatomy of the Arm: Cubital Fossa and its Contents and more Exercises Anatomy in PDF only on Docsity!

Arm & Cubital Fossa

Dr Brijendra Singh

MBBS,MS,DNB,MNAMS Professor & HoD Anatomy

AIIMS Rishikesh

Learning Objectives

• At end of this session, students should be able to:
• DESCRIBE
• Attachments, actions & innervations of - biceps brachii, coracobrachialis, brachialis, triceps brachii
• Contents of ant & post compartment of arm , their anatomical Relations and clinical importance
• Boundaries of cubital fossa and its contents.

Anterior Brachial Compartment

BBC – Musculocutaneous nerve

Innervation

• Musculocutaneous nerve C5- 6
• Nerves passing through compartment - But

not innervating anterior compartment

structures are : Median & Ulnar nerve

Through proximal part of anterior

compartment.

• Blood supply –
• Brachial artery
• Basilic vein and venae comitantes

Posterior compartment Triceps & anconeus – Radial Nerve

Nerves and Vessels in Arm

Median Nerve

• Supplies flexor muscles on radial side of

forearm.

• Travels with brachial artery:
• upper half - Lateral to brachial artery.
• lower half - Medial to brachial artery.
• Crosses cubital fossa superficially:
• With brachial artery &
• Deep to bicipital aponeurosis

Radial Nerve - PC

• Supplies extensor muscles in posterior compartment of brachium as well as extensor muscles of wrist and hand.
• Also supplies brachioradialis muscle- Propioceptive
• Descends posterior to axillary artery:
• Spirals around the posterior surface of humerus in spiral (radial) groove.
• Accompanied with Profunda brachial artery.

Radial Nerve

• Pierces lateral intermuscular septum distal to deltoid insertion – enters into anterior compartment.
• Passes into forearm:
• Between the brachialis medially and brachioradialis laterally.
• Divides into superficial and deep branches near lateral epicondyle.

Radial Nerve

• Branches in radial groove in middle third

of arm:

• Branch to lateral head , medial head of

triceps and anconeus.

• Lower lateral cutaneous nerve of arm.
• Posterior cutaneous nerve of forearm.

Arm

Shoulder Elbow A R M Bone of Arm Humerus Anterior view Posterior view

Anterior Compartment: Contents

Anterior Compartment: Contents

• Muscles: Biceps brachii,

Coracobrachialis, Brachialis

• Blood Vessels: Brachial artery, Basilic

vein

• Nerves : Musculocutaneous, Median,

Ulner & Radial