Anatomy Lab 5

Arterial

100

What is the artery on the medial side of the forearm that makes the superficial palmar arch?

Ulnar Artery

200

What artery goes through the anatomical snuffbox?

Radial Artery

300

What supplies the dorsal interosseous of the hand?

dorsal and palmar metacarpal arteries

400

The common palmar digital arteries give rise to?

Proper palmer digital arteries

500

What artery goes to the ventral aspect of the thumb?

Princeps pollicis artery

Nerves / Innervation

100

What nerve supplies the majority of the hand?

Ulnar nerve (mainly through the deep branch)

200

What nerve passes through guyons canal?

 ulnar nerve

300

Adductor Pollicis

Deep branch of ulnar nerve

400

Name the branches that the median nerve turns into in the hand for motor innervation?

1. Digital branches (lumbricals 1/2)

2. Recurrent Branch (Thenar)

 

500

Palmaris Brevis

Superficial branch of ulnar nerve

Injury

100

If an individual severs the recurrent branch of the median nerve, what muscles will be impacted?

The thenar muscles!!

- Opponens pollicis

- ABductor Pollicis Brevis

- Flexor Pollicis Brevis

200

Patient presents with paresthesia of the lateral 3 1/2 fingers in the distal portion of the palm. What would this injury be called?

Carpal Tunnel Syndrome

300

Patient came into the ER after wrist slashing. The lateral aspect of the patient's hand would present with what findings? (sensation pattern) 

Full median sensation loss - the superficial palmar branch will now be cut additionally.

400

Patient presents with a positive Froment sign and wasting of the 1st interwebbing space. What nerve would be injured in this scenario?

Ulnar Nerve

500

Patient presents with a failure of the Allen test on the medial aspect of the hand, what has been occluded?

Collateral arteries from the Ulnar artery!

Attachments

100

Lumbricals

Proximal: Tendons of flexor digitorum profundus   

Distal: Extensor hoods of index, ring, middle, and little fingers

200

Opponens Pollicis

Trapezium --> Palmar surface of metacarpal 1

300

Opponens digiti minimi

Pisiform --> proximal phalanx of pinky 

400

Palmar interossei / How many are there?

•  1st Palmar Interosseous: Arises from the ulnar side of the 2nd metacarpal (index finger).
• 2nd Palmar Interosseous: Arises from the radial side of the 4th metacarpal (ring finger).
• 3rd Palmar Interosseous: Arises from the radial side of the 5th metacarpal (little finger). 

---> Extensor hoods of the thumb, index, ring, and little fingers and the proximal phalanx of the thumb

There are 3!

500

Palmaris Brevis attachments? (medial & lateral)

Lateral: Palmar aponeurosis and flexor retinaculum    

Medial: Dermis of skin on the medial margin of the hand

Actions

100

Flexor pollicis brevis

Flexes thumb @ MP joint

200

Opponens pollicis

Medially rotates thumb

300

Palmar Interossei

ADDuction (PADs!!) --> Palmar interossei

400

Lumbricals

Flexes --> MP

Extends ---> IP

500

Palmaris Brevis

Increases grip