Lecture 12: Muscles of the Posterior Forearm Flashcards

1
Q

What are the 3 layers of the posterior forearm?

A
  • Superficial
  • Deep
  • Outcropping
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2
Q

What are the superficial muscles of the posterior forearm?

A
  • Brachioradialis
  • Extensor Carpi Radialis Longus
  • Extensor Carpi Radialis Brevis
  • Extensor Digitorum
  • Extensor Digiti Minimi
  • Extensor Carpi Ulnaris
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3
Q

What are the deep muscles of the posterior forearm?

A
  • Supinator

- Extensor Indicis

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4
Q

What are the outcropping muscles of the posterior forearm?

A
  • Abductor pollicis longus
  • Extensor pollicis brevis
  • Extensor pollicis longus
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5
Q

Where do most of the posterior forearm muscles originate from?

A

From the lateral epicondyle of the humerus, known as the “common extensor origin”

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6
Q

What is the brachioradialis also known as?

A

The drinking muscle

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7
Q

How many bands does the tendon of the extensor digitorum divide into?

A

a median band and 2 lateral bands

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8
Q

Where does the median and lateral band insert on the finger?

A

The median band inserts on the middle phalanx.

The lateral bands insert on the distal phalanx.

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9
Q

When can we see the anatomical snuff box?

A

When the thumb extends

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10
Q

What is the floor of the anatomical snuff box formed by?

A

Scaphoid & Trapezium

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11
Q

How can we feel our pulse at the anatomical snuff box?

A

The radial artery passes by through this space

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12
Q

What nerve can we find superficial to the anatomical snuff box?

A

The superficial branch of the radial nerve

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