Week 12, Thursday

Exam 3 is everything from the Midterm to the end of this lesson today!!!!!!

Posterior Antebrachium / Dorsum of Hand ppt

New Osteology:

• Proximal Ulna-

  • Supinator Crest

• Distal Radius -

  • Groove for Ext. Pol. Longus

  • Dorsal Tubercle of Radius

  • Groove for ext. carpi radialis longus and brevis

  • Groove for extensor Digitorum and extensor indicis

  • Ulnar notch

  • Styloid process

Cutaneous Nerves:

• Medial antebrachial cutaneous nerve arises from medial cord of the brachial plexus

• Lateral Antebrachial cutaneous nerve continuation of the musculocutaneous nerve

• Posterior antebrachial cutaneous nerve arises from the radial nerve

Extensor retinaculum on the dorsal side of the wrist

• base of the Anatomical Snuff Box

Muscles of the Posterior Arm (Extensor-supinator compartment):

• Superficial layer:

  • Anconeus

  • Brachioradialis

  • Extensor carpi radialis longus

  • Extensor carpi radialis brevis

  • Extensor Digitorum

  • Extensor digiti minimi

  • Extensor carpi ulnaris

• Deep layer:

  • Supinator

  • Abductor Pollicis Longus

  • Extensor Pollicis longus

  • Extensor pollicis brevis

  • Extensor indicis

Learn the O, I, N, Art and Act of these muscles

Muscles arising from the common extensor tendon:

• Ext. carpi radialis brevis

• Ext. Digitorum

• Ext. Digiti minimi

• Ext. carpi ulnaris

Muscle Innervation:

• Radial Nerve:

  • Anconeus

  • Brachioradialis

  • Ext. Carpi radialis longus

• Deep branch of Radial Nerve:

  • Ext. Carpi radialis brevis

• Posterior Interosseous Nerve:

  • Ext. Digitorum

  • Ext. digiti minimi

  • Ext. carpi ulnaris

  • Abd. Pollicis longus

  • Ext. pollicis longus

  • Ext. pollicis brevis

  • Ext. Indicis

  • Supinator

Anatomical Snuff Box:

• Boundaries:

  • Lateral: tendons of abductor pollicis longus and ext. pollicis brevis

  • Medial: tendon of the extensor pollicis longus

• Contents:

  • Radial artery

  • Radial styloid process

  • Scaphoid

  • Trapezium

Insertions onto the Phalanges of the Hand:

• Proximal phalanx:

  • Abd. Pol. Brevis

  • Flex. Pol. Brevis

  • Abd. Digiti minimi

  • Flex. Digiti mini brevis

  • Add. Pollicis

  • Palmar interossei

  • Dorsal Interossei

• Middle Phalanx:

  • Flex. Digit. Super.

• Distal Phalanx:

  • Flex. Digit. Profundus

  • Flex. Pol. Longus

  • Ext. Pol. Longus

• Dorsal Digital Expansions of the Lesser Digits:

  • Ext. Digitorum