BMS MSK Asynchronous Lecture 7 STUDENTS.pptx.pdf

BMS Anatomy Asynchronous Lecture 7 Muscles of the Anterior Forearm Presented By: Dr. M. Doroudi; [email protected] Boucher Campus) Moore's Clinically Oriented Anatomy, by Arthur F. Dalley II Ph.D. FAAA (Author), Anne M. R. Agur BSc (OT) MSc Ph.D. FAAA (Author), 9th ed. Upper Limb Chapter; Pages: 221...

BMS Anatomy Asynchronous Lecture 7 Muscles of the Anterior Forearm Presented By: Dr. M. Doroudi; [email protected] Boucher Campus) Moore's Clinically Oriented Anatomy, by Arthur F. Dalley II Ph.D. FAAA (Author), Anne M. R. Agur BSc (OT) MSc Ph.D. FAAA (Author), 9th ed. Upper Limb Chapter; Pages: 221 – 227 Forearm Compartments Flexor – Pronator Median and/or Ulnar Ns. Extensor - Supinator Radial N. Retinacula Flexor-Pronator Muscles Pronator Teres (PT); Ori: - Humeral head: Medial epicondyle of humerus (via common flexor tendon) - Ulnar head: Coronoid process of ulna Ins: Middle of the lateral surface of radius Fun: N: 5 PT Note Impeachment of median nerve between two heads of PT; pronator syndrome 6 Flexor Carpi Radialis FCR); Ori: Medial epicondyle of humerus (via common flexor tendon) Ins: Base of the 2nd & 3rd. Metacarpals Fun: N: 7 FCR Notes Radial A. pulse 8 Palmaris Longus (PL); Ori: Medial epicondyle of humerus (via common flexor tendon) Ins: - Palmar aponeurosis - Flexor retinaculum Fun: N: 9 PL Notes Absent in 12-20% of population 10 Flexor Carpi Ulnaris (FCU); Ori: Humeral Head: Medial epicondyle of humerus (via common flexor tendon) Ulnar Head: 1. Olecranon process of ulna 2. Posterior border of ulna Ins: 1. Base of the 5th metacarpal 2. Hook of hamate 3. Pisiform Fun: N: 11 FCU Notes Only muscle which is innervated by ulnar N. Course of ulnar N. between its two heads 12 First four Flexors 13 Intermediate layer, has only one muscle Flexor Digitorum Superficialis (FDS); Ori: Humero-ulnar head: - Medial epicondyle of humerus (via common flexor tendon) - Coronoid process of ulna Radial head: - Proximal of anterior border of radius Ins: - Base of middle phalanges of fingers # 2-5 Fun: N: 14 FDS Notes Irritation of the tendon sheath in CT and pressing the median N. 15 ❑ Deep layer; Flexor Digitorum Profundus (FDP); Ori: - Proximal anterior & medial surface of ulna - Interosseous membrane Ins: Base of distal phalanges of fingers # 2-5 Fun: N: FDP Notes Dual innervation Role of medial and lateral halves of muscle in flexing the fingers 17 Flexor Pollicis Longus (FPL); Ori: - Anterior surface of the: - Radius - Interosseous membrane Ins: Base of distal phalanx of thumb Fun: N: FPL Notes One of the C. Tunnel muscles 19 Pronator Quadratus (PQ); Ori: Anterior surface of distal ¼ of ulna Ins: Anterior surface of distal ¼ of radius Fun: N: 20