3.4.7. Nerves of the Hand Flashcards
What are the 3 Nerves associated with the Hand?
- Radial Nerve
- Median Nerve
- Ulnar Nerve
Which of the 3 Nerves associated with the Hand, only provides Sensory innervation?
Radial Nerve
What is the Segmental (or Root) Value of the Raidal Nerve?
- C5
- C6
- C7
- C8
- T1
Other than in the Hand, where else does the Radial Nerve provide Sensory innervation of?
Posterior Side of the Forearm
What are the 4 Branches of the Radial Nerve, which provide Cutaneous Innervation of the Upper Limb?
- Lower Lateral Cutaneous Nerve of the Arm
- Posterior Cutaneous Nerve of the Arm
- Posterior Cutaneous Nerve of the Forearm
- Superficial Branch of the Radial Nerve
Which of the 4 Radial Nerve Branches, which provides Cutaneous Innervation, is associated with the Hand?
Superficial Branch of the Radial Nerve
Where does the (Terminal) Superficial Branch of the Radial Nerve, branch off?
Just Distal to the Cubital Fossa
Where, on the Palm, does the Superficial Branch of the Radial Nerve provide sensory innervation?
- Dorsal Surface of the Lateral 3 1/2 Digits
2. Their Associated Palm Area
Which Nerves are Responsible for Motor innervation in the Hand?
- Median Nerve
2. Ulnar Nervw
What is the Segmental (or Root) Value of the Median Nerve?
- C5
- C6
- C7
- C8
- T1
How does the Median Nerve travel to enter into the Hand?
Via the Carpal Tunnel
What happens to the Median Nerve as it enters into the Hand?
It Terminates, Bifurcating into 2 Nerves
What are the Nerves the Median Nerve Bifurcates into as it Terminates?
- Recurrent Branch of the Median Nerve
2. Palmar Digital Branch of the Median Nerve
Does the Median Nerve transmit:
- Motor Information?
- Sensory Information?
- Yes
2. Yes
Which of the Nerves the Median Nerve Bifurcates into as it Terminates, supply Motor Innervation?
Both:
- Recurrent Branch of the Median Nerve
- Palmar Digital Branch of the Median Nerve
What does the Recurrent Branch of the Median Nerve innervate?
Thenar Muscles of the Hand
What are the Thenar Muscles associated with?
Movement of the Thumb
What does the Palmar Digital Branch of the Median Nerve innervate?
Lateral 2 Lumbrical Muscles of the Hand - Index and Middle Fingers
What are the Lateral 2 Lumbrical Muscles of the Hand associated with?
- Flexion of the Metacarpophalangeal Joints of the Index and Middle Fingers
- Extension of the Interphalangeal Joints of the Index and Middle Fingers
Where is the Sensory Information from the Median Nerve recieved from?
Hand
What are the 2 Branches of the Median Nerve which will recieve Sensory Information?
- Palmar Cutaneous Branch of the Median Nerve
2. Palmar Digital Cutaneous Branch of the Median Nerve
Where does the Palmar Cutaneous Branch of the Median Nerve Originate from?
Forearm
Where does the Palmar Cutaneous Branch of the Median Nerve travel?
Into the Hand from the Forearm
Does the Palmar Cutaneous Branch of the Median Nerve travel through the Carpal Tunnel?
No
What is the Clinical Significance of the Palmar Cutaneous Branch of the Median Nerve not travelling through the Carpal Tunnel?
It is Spared in Carpal Tunnel Syndrome
Where does the Palmar Cutaneous Branch of the Median Nerve recieve Sensory Information from?
Lateral Aspect of the Palm
Where does the Palmar Digital Cutaneous Branch of the Median Nerve Originate from?
Hand
Where does the Palmar Digital Cutaneous Branch of the Median Nerve recieve Sensory Information from?
- Palmar Surface of the Lateral 3 1/2 Digits
2. Fingertips of the Lateral 3 1/2 Digits
What is the Segmental (or Root) Value of the Ulnar Nerve?
- C8
2. T1
Where does the Ulnar Nerve travel at the Wrist?
Superficially to the Flexor Retinaculum
How does the Ulnar Nerve enter into the Hand?
Via the Ulnar Canal
What is the Ulnar Canal also known as?
Guyon’s canal
What happens to the Ulnar Nerve in the Hand?
It Terminates, Bifurcating into 2 Nerves
What are the Nerves the Ulnar Nerve Bifurcates into, as it Terminates?
- Superficial Branches of the Ulnar Nerve
2. Deep Branches of the Ulnar Nerve
Which of the Ulnar Nerve Branches (as it Bifurcate) supplies Motor Innervation?
Deep Branches of the Ulnar Nerve
What Muscles of the Hand are innervated by the Deep Branches of the Ulnar Nerve?
- Hypothenar Muscles
- Medial 2 Lumbrical Muscles (Ring and Little Finger)
- Adductor Pollicis
- Interossei of the Hand
- Palmar Brevis
What are the Hypothenar Muscles associated with?
- Medial aspect of the Palm
2. Little finger
How many Branches of the Ulnar Nerve are responsible for Sensory Cutaneous Innervation?
3
What are the Branches of the Ulnar Nerve are responsible for Sensory Cutaneous Innervation?
- Palmar Cutaneous Branch of the Ulnar Nerve
- Dorsal Cutaneous Branch of the Ulnar Nerve
- Superficial Branch of the Ulnar Nerve
Which 2 Branches of the Ulnar Nerve are responsible for Sensory Cutaneous Innervation arise in the Forearm?
- Palmar Cutaneous Branch of the Ulnar Nerve
2. Dorsal Cutaneous Branch of the Ulnar Nerve
Which Branches of the Ulnar Nerve are responsible for Sensory Cutaneous Innervation arise in the Hand?
Superficial Branch of the Ulnar Nerve
Which part of the Hand does the Palmar Cutaneous Branch of the Ulnar Nerve, recieve Sensory Information from?
Skin on the Medial Half of the Palm
Which part of the Hand does the Dorsal Cutaneous Branch of the Ulnar Nerve, recieve Sensory Information from?
Skin of the Medial 1 1/2 Fingers, and the associated Dorsal Hand Area
Which part of the Hand does the Superficial Branch of the Ulnar Nerve, recieve Sensory Information from?
Palmar Surface of the Medial 1 1/2 Fingers
