Forearm Anatomy Slides PDF

Forearm Dan Selski, Ph.D. https://manofmany.com/lifestyle/fitness/best-forearm-workouts-exercises Bones of Forearm Radial head Study all details in handout note orientation of radial and ulnar heads interosseous membrane...

Forearm Dan Selski, Ph.D. https://manofmany.com/lifestyle/fitness/best-forearm-workouts-exercises Bones of Forearm Radial head Study all details in handout note orientation of radial and ulnar heads interosseous membrane Ulnar head Bones of wrist and hand Study all this also! Focus for this lecture: naming of phlanges naming of joints: wrist joint MP joints (aka MCP) PIP joints DIP joints Fascia / Compartments Antebrachial fascia Fascia / Compartments Anterior Compartment d Posterior Compartment Antebrachial fascia Movements Review from previous lectures. Flexor (&Pronator) Muscles in Anterior Compartment orient yourself using 3-4 layers or groups as a model. first layer – pronator or wrist/hand & flexors of wrist Flexor / Anterior mm. palmaris long. FCU & FCR fxn in aB/aD-duction Flexor / Anterior mm. 2nd layer (intermediate) – FDS note several proximal attachments carpal tunnel note distal attachment splits @ middle phlanges 2-5 Flexor / Anterior mm. 3rd layer / deep group FDP – does not cross elbow carpal tunnel tendons to distal phalanges 2-5 INNERVATION FPL – carpal tunnel to distal phalanx Flexor / Anterior mm. Carpal Tunnel contents: Clinical testing of FDS & FDP: ↓ view is if you cut off your right hand and looked from proximal to distal ↓ https://www.researchgate.net/publication/329674514_Ten_Tips_to_Sim plify_the_Spaghetti_Wrist DOI: 10.1097/GOX.0000000000001971 LicenseCC BY-NC-ND Clifton G. Meals & James Chang Flexor/ Pronator / Anterior mm. 3rd / 4th layer / deep group Flexor / Anterior mm. extra figs for study from Moore’s textbook: Extensor (&Supinator) Muscles in Posterior Compartment orient yourself to layers; only a couple, though. (see different view in Moore’s figs) brachioradialis (more noticeable laterally & anteriorly) anconeus may be “hidden” in proximal antebrachial fascia extensors of wrist surround extensors of digits note: two (2) extensor carpi radialis mm. none named “superficialis” nor “profundus” mm.; BUT digits 2 & 4 (index & pinky) each have an extra extensor muscle Extensor / Posterior mm. extensor retinaculum & synovial compartments and extensor hoods (extensor expansions) Extensor / Posterior mm. deep group(s): Supinator Ext. Indices Outcropping mm. (to digit #1; thumb) Extensor / Posterior mm. Different / Extra views of extensors from Moore’s textbook. Extensor / Posterior mm. Different / Extra views of extensors from Moore’s textbook. Nerves - Overview review origin from brachial plexus focus initially on muscle innervation then add cutaneous branches Nerves - Median no function in arm innervates nearly ALL mm. in ant. forearm! Course: between heads of pronator teres ant. inter. n.: b/t FDP & FPL between FDS & FDP to carpal tunnel Nerves - Ulnar no function in arm innervates 1 ½ mm. in forearm (does more in hand) Course: around medial epicondyle b/t heads of FCU b/t FCU & FDP continues to hand (Guyon’s tunnel) Nerves - Radial Course: posterior ant. to lat. epicondyle interosseous n. b/t brachioradialis & ECRL Deep Branch: innervates other superficial mm. into supinator posterior interosseous n. is continuation to outcropping & other mm. Superficial Branch: cutaneous only to hand Nerves - Cutaneous Median & Ulnar nn.: NO cutaneous distribution in arm/forearm! Radial n.: several named cutaneous branches! Review where lateral, medial, & posterior cutaneous nn. of forearm branch from. Arteries General Things: recurrent aa. naming…… continuation into hand posterior compartment from branches in ant. comparment Arteries – Radial a. supplies lateral mm. in ant. compartment Course: under brachioradialis (w/ sup. br. radial n.) under outcropping mm. tendons to deep hand Arteries – Ulna a. Supplies medial & deep mm. of ant. comp. AND post. compartment Course: under FDS medially w/ ulnar n. to superficial palm Common Inteross. a. ant. inteross. a. post. inteross. a. Arteries – anterior and posterior interosseous aa. d Veins venae comitantes for all named arteries review superficial vv.! perforating veins from superficial to deep venous systems Joints mostly covered in other lectures. review elbow. focus on: proximal radioulnar joint interosseous membrane distal radioulnar joint preview wrist: radius is main joint with carpals