Identify the muscle labelled #6
[ Select ]
pronator teres
brachialis
supinator
brachioradialis
anconeus
and the muscle labelled #7
[ Select ]
pronator teres
supinator
pronator quadratus
brachioradialis

Question

Identify the muscle labelled #6 
[ Select ]
pronator teres
brachialis
supinator
brachioradialis
anconeus
 and the muscle labelled #7 
[ Select ]
pronator teres
supinator
pronator quadratus
brachioradialis

BlackTom AI · Accepted Answer

First, the question asks to identify two muscles labeled on a diagram: #6 and #7, with two sets of possible muscle names for each.
Option analysis for muscle labelled #6:
- brachioradialis: This muscle runs along the lateral (thumb-side) aspect of the forearm and is a primary elbow flexor, especially when the forearm is in a mid-pronated to neutral position. It is the most plausible match for a label placed on the lateral forearm near the elbow.
- pronator teres: This is a superficial muscle of the anterior forearm that contributes to forearm pronation and elbow flexion, but it lies more medially and proximally than the brachioradialis and is not the lateral forearm landmark typically highlighted as a primary elbow flexor.
- supinator: This muscle lies deeper in the posterior-lateral aspect of the forearm and is chiefly involved in forearm supination, not elbow flexion, making it unlikely for a label on the elbow-near lateral region.
- brachialis: A strong elbow flexor located deep to the biceps, situated in the anterior arm, not along the lateral forearm where the brachioradialis sits.
- anconeus: A small muscle at the posterior aspect of the elbow that assists with elbow extension, not a primary elbow flexor or lateral forearm landmark.
Thus, option 1 (brachioradialis) best fits a label on the lateral forearm near the elbow.

Option analysis for muscle labelled #7:
- pronator teres: A primary pronator of the forearm located in the proximal anterior forearm, making it a strong candidate for a label associated with pronation.
- supinator: Functions to supinate the forearm; if #7 were here, it would imply a supination function rather than pronation, which is inconsistent with the most likely labeling context unless the diagram emphasizes pronation.
- pronator quadratus: A deep, square-shaped muscle in the distal anterior forearm contributing to pronation; less likely to be labeled as a prominent superficial feature in many diagrams.
- brachioradialis: As noted, this muscle is a lateral forearm flexor, not a primary pronator, so it is unlikely for a label indicating pronation.
Therefore, option 2 (pronator teres) is the most suitable match for a label associated with forearm pronation on the diagram.

In summary:
- For #6, brachioradialis is the most plausible choice among the listed options due to its anatomical location and function as a primary elbow flexor in the lateral forearm.
- For #7, pronator teres is the most plausible choice due to its function as a primary forearm pronator located in the proximal anterior forearm.

2025FA-HES-207-001 A. Final Exam - B without lockdown

Identify the muscle labelled #6 [ Select ] pronator teres brachialis supinator brachioradialis anconeus and the muscle labelled #7 [ Select ] pronator teres supinator pronator quadratus brachioradialis

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