Kinesiology 2241A/B Lecture Notes - Lecture 3: Rectus Femoris Muscle, Biceps Femoris Muscle, Impingement Syndrome
28 Jan 2020
School
Department
Course
Professor
Sofia Molnarova
250960922
11/19/2018
Assignment 3
1. Stand in back of a partner. Place your hand on your partner’s scapula. The partner slowly abducts
the arm over his or her head.
1. What movement of the scapula occurs?
1. Upward rotation
2. When do you start to notice it (in degrees)?
1. At approximately 30 degrees
3. Why is this movement necessary?
1. Upward rotation of the scapula is very important as it allows the upper extremity
to have its full range of motion. Ie. through this movement one is able to abduct
their arm over their head. If the scapula was not able to rotate upwards, the
humerus would compress into the acromion causing shoulder impingement
syndrome.
4. What does it do to the glenoid fossa?
1. The glenoid fossa moves in accordance with the head of the humerus. It rotates
upwards about 2 degrees for every 3 degrees of humeral abduction. This
movement is adequate enough to prevent acromial compression.
2. 2. Identify the hip and knee movements during the execution (force) phase of the following
activities:
1. (a) a whip kick in the breaststroke,
1. Knee flexion to extension and external rotation, hip flexion to extension
2. (b) mounting a horse, swinging the right leg over,
1. Knee flexion, hip abduction
3. (c) a football punt,
1. Knee extension, hip flexion
4. (d) a headspring,
1. Knee flexion, hip extension
5. (e) a soccer-style placekick.
1. Knee extension, hip flexion
-Are there two-joint muscles involved in the movements? Which joints do they cross? How
could two-joint muscles be related to injuries?
-Yes there are two joint muscles involved in these movements, for example the biceps
femoris and the rectus femoris. These muscles cross both the hip and knee joints. Two
joint muscles could be related to injuries due to passive insufficiency. If the muscle is
Document Summary
Assignment 3: stand in back of a partner. Ie. through this movement one is able to abduct their arm over their head. It rotates upwards about 2 degrees for every 3 degrees of humeral abduction. This movement is adequate enough to prevent acromial compression: 2. Identify the hip and knee movements during the execution (force) phase of the following activities: 1. (a) a whip kick in the breaststroke: knee flexion to extension and external rotation, hip flexion to extension. 2. (b) mounting a horse, swinging the right leg over: knee flexion, hip abduction. 3. (c) a football punt: knee extension, hip flexion. 4. (d) a headspring: knee flexion, hip extension. 5. (e) a soccer-style placekick: knee extension, hip flexion. Yes there are two joint muscles involved in these movements, for example the biceps femoris and the rectus femoris. These muscles cross both the hip and knee joints. Two joint muscles could be related to injuries due to passive insufficiency.
