3.4.1. Thenar Muscle Compartment Flashcards
What are the 2 Groups, which the Muscles that act on the Hand, can be Divided into?
- Extrinsic Muscles
2. Intrinsic Muscles
Where are the Extrinsic Muscles of the Hand located?
- Anterior Compartment of the Forearm
2. Posterior Compartment of the Forearm
What are the functions of the Extrinsic Muscles of the Hand?
- Control Crude Movements
2. Produce a Forceful Grip
Where are the Intrinsic Muscles of the Hand located?
Within the Hand itself
What is the function of the Intrinsic Muscles of the Hand?
Fine Motor Control of the Hand
What are the 5 Muscle Compartments, of the Intrinsic Muscles of the Hand?
- Thenar Muscle Compartment
- Hypothenar Muscle Compartment
- Adductor Compartment
- Lumbricals and Long Flexor Tendons (Central) Compartment
- Interossei Compartment
How many Thenar Muscles are there?
3
Where are the Thenar Muscles Located?
The Base of the Thumb
What is the name of the Bulge which the Thenar Muscle Bellies produce?
Thenar Eminence
What are the Thenar Muscles responsible for?
Fine Movements of the Thumb
What innervates the Thenar Muscles?
Recurrent Branch of the Median Nerve
What are the 3 Thenar Muscles?
- Opponens Pollicis
- Abductor Pollicis Brevis (APB)
- Flexor Pollicis Brevis (FPB)
Which of the Thenar Muscles is the Largest?
Opponens Pollicis
Where is the Opponens Pollicis located, in relation to the other 2 Thenar Muscles?
Deep to the other 2 (Underneath)
Where does the Opponens Pollicis Originate from?
- Tubercle of the Trapezium
2. Associated Flexor Retinaculum