Cubital Fossa

Anatomical Snuffbox Contents

Anterior Interosseous N vs Posterior Interosseous N

Anterior Interosseous A vs Posterior Interosseous A

Ant Inteross N: Radial N

Post Inteross N: Ulnar N

Ant Inteross A: Ulnar A

Post Inteross A: Ulnar A

Cubital Fossa Boundaries + Contents

BOUNDARIES: Brachioradialis, Pronator Teres, Line connecting HUMERAL epicondyles, Bicipital Aponeurosis

CONTENTS: Median Cubital V, Tenodn of Biceps Brachii, Median N, Brachial A + Terminal Ulnar + Radial Branch

Anterior Compartment is supplied by ___ and ____ Arteries.

Posterior Compartment is subblied by ___ and ____ Arteries

Ant: ULNAR + ANT interosseous AA
Post: RADIAL + POST interrosseous AA

Radial A vs Ulnar A

ANTERIOR vs POSTERIOR Forarm

Held by RETINACULAE
Anterior: “AF”

• Flexors

• Median N

• COMMON MUSCLE MASS: Medial Epidcondyle

  • MEDIAL EPICONDYLITIS

Posteriors: “PE”

• Extensors/Supination

• Radial N

• COMMON MUSCLE MASS: Lateral Epicondyle

  • LATERAL EPICONDYLITIS (Tennis Elbow)

FLEXORS: Superficial, Intermediate, Deep

INNERVATED BY: MEDIAN N

Superficial:

• Pronator Teres

• Flexor Carpi Radialis

• Palmaris Longus

• Flexor Carpi Ulnaris

Intermediate:

• Flexor Digitorum Superificialis

Deep:

• Flexor Digitorum Profundus (Ulnar + Median Innervation)

• Flexor Pollicis Longus

• Pronator Quadratus —> Anterior Interosseous

EXTENSORS:

INTERVATED BY: RADIAL N

Superficial:

• Brachioradialis

• Extensor Carpi Radialis Longus

• Extensor Carpi Radialis Brevis

• Extensor Digitorum

• Extensor Digiti Minimi

• Extensor Carpi Ulnaris

Deep:

• Abductor Pollicis Longus

• Extensor Pollicis Brevis

• Extensor Pollicis Longus

• Extensor Indicis

• Supinator

Radial Superficial vs Deep Branch of Radial N

Blood Supply Path of Forearm:

Brachial —> Radial + Ulnar A

Radial A —> Brachioradialis and follows Radias

Ulnar —> Common interosseous A —> Anterior Interosseous and Posterior Interosseous

Forearm Innervation Path of Lateral Antebrachial + Medial Antebrachial + Posterior Antebrachial

DISTAL RADIOULNAR JOINT:

MOVEMENT: Supination + Pronation

• Proximal: Annular Ligament

• Distal: Dorsal + Palmar Radioulnar Ligaents

• DISTAL: Articular (ulnar Disc)

RADIOCARPAL JOINT:

MOVEMENTS: ulnar + rad deviation, flexion + extension

Scaphoid, Lunate, Triquetum

Ligaments:

• Radiocarpal + Ulnarcarpal Collat

• Dorsal Radiocarpal

• Palmar Radiocarpal + Ulnocarpal

Flexor Carpi Radialis

M: Flexion + Radial Deviation of Wrist

N: Median N

PA: Medial Epicond

PD: Distal MC of D2

G: Flexor Superficial

Notes: Radial A palpated next to this

Pronator Teres

M: Pronation (wrist)
N: Median
PA: Medial Epicondyle + Proximal Ulna
PD: Midshaft Radius

G: Flexor Superficial

Palmaris Longus

M: Wrist Flexor
N: Median
PA: Medial Epicondyle
PD: Palmar Aponeurosis
G:

Flexor Carpi Ulnaris

M: Flex + Ulnar Dev of Wrist
N: Ulnar N
PA: Medial Epicondyle + Olecranon
PD: Pisiform + Hook of Hamate + MC B5
G:Flexor Superficial

Flexor Digitorum Superificalis

M: Flex PIP of 2-5
N: Median N
PA: Medial Epicondyle + midshaft Radius
PD: Distal Middle Phalanges of D2-5
G: Flexor INTERMEDIATE

Flexor Digitorum Profundus

M: Flex Digi 2-5
N: Median + Ulnar
PA: Ulna + Interosseous Membrane
PD: DIP
G: Flexo DEEP

Flexor Pollicus Longus

M: Flex DIP of thumb
N: Anterior Interosseous of MEDIAN N
PA: Radial Shaft
PD: Distal Phalanx D1
G: Flexor DEEP

Pronator Quadratus

M: Pronation of Wrist

N: Anterior Interosseous Median N

PA: Distal Ulna

PD: Distal Radius

G: Flexor DEEP

Brachioradialis

M: Elbow FLEX
N: Radial N
PA: Lateral Supracondylar Ridge
PD: Radial Styloid Process
G: Extensor Superficial

NOTE: C5-C6 Tendon Test, FLEXOR IN THE EXTENSOR DEPARTMENT

Extensor Carpi Radialis Longus

M: Extension + Radial Deviation
N: Radial N
PA: Lateral Supracondylar
PD: MC Base of 2nd MC
G: Extensor Superficial

Extensor Carpi Radialis Brevis

M: Extension + Rad Deviation of Wrist
N: Radial N
PA: Lateral Epicondyle
PD: 3rd MC Distal
G: Extensor Superificial

Extensor Digitorum

M: Extension of D2-5 at MCP
N: Radial N
PA: Lateral Epicondyle
PD: Extensor Expansions
G: Extensor Superficial

Extensor DIgit Minimi

M: Extend Pinkie at Metacarpopharyngeal JOINTS
N: Radial N
PA: Lateral epicondyle
PD: Extensor Expansion of D5
G: Extensor SUPERFICIAL

Extensor Carpi Ulnaris

M: Extend Wrist + Ulnar Deviation
N: Radial N
PA: Lat Epicodnyle
PD: Distal Attachment of MC 5
G: Extensor Superficial

Abductor Pollicis Longus

M: Abduction D1
N: POSTERIOR INTEROSSEOUS (Radial N)
PA: Ulna, Radius, Interosseous Membrane
PD: Base of MC1
G: Extensor Deep

Extensor Pollicis Brevis

M: Extension of THUMB at MCP
N: Posterior Interosseous (Radial N)
PA: Distal Radius
PD: Prox Phalanx of D1
G: Extensor Deep

Extensor Pollicis Longus

M: Thumb Extension at IP
N: Posterior Interosseous (Radial N)
PA: Distal Ulna
PD: Distal Phalanx of D1
G: Extensor Deep

Extensor Indicis

M: Extension of D2 at MCP (Knuckle)
N: Posterior Interosseous (Radial N)
PA: Distal Ulna
PD: Extensor Expansion D2
G: Extensor Deep

Supinator

M: Wrist Supination
N: Radial N
PA: Lat Epicondyle + PROX ulna
PD: Prox Radius
G: Extensor DEEP

Thumb Movements: Adduction, Abduction, Extension, Flexion

Flexion/Extension: Hand Hug

Abduction/Add: L with Hand, Thumb back to side of hand