Lab 8 - Human Muscles



Labs 16, 17, 18

Cat Muscle Dissection and Identification (use pictures and video provided)

NOTE: All deep muscles will be dissected on the right side of the body only. Superficial muscles will remain intact on the left side of the body. Identify the following muscles:

|Abdomen |Upper Arm |

| | |

|external oblique |epitrochlearis |

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|internal oblique |biceps brachii |

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|transverse abdominis |triceps brachii (long head) |

| | |

|rectus abdominis |triceps brachii (medial head) |

| | |

| |triceps brachii ((lateral head) |

|Chest & Neck | |

| |brachialis |

|xiphihumeralis | |

| | |

|pectoralis major |Upper Leg |

| | |

|pectoralis minor |biceps femoris |

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|pectoantebrachialis |semitendinosus |

| | |

|serratus ventralis (anterior) |semimembranous |

| | |

|rectus abdominis |adductor femoris |

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|scalenius medius |adductor longus |

| | |

|rectus thoracis (transverse costarum) |vastus lateralis |

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|subscapularis |vastus medialis |

| | |

| |rectus femoris |

|Back | |

| |sartorius |

|clavotrapezius | |

| |gracillis |

|clavobrachialis (clavodeltoid) | |

| |tensor fascia latae |

|acromiotrapezius | |

| |pectineus |

|spinotrapezius | |

| | |

|levator scapula |Lower Leg |

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|acromiodeltoid |gastrocnemius |

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|spinodeltoid |soleus |

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|rhomboideus |peroneus muscles |

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|supraspinatus |tibialis anterior |

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|teres major |extensor digitorum longus |

| | |

| | |

|teres minor |Hip |

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|infraspinatus |gluteus maximus |

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|latissimus dorsi |gluteus medius |

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| |caudofemoralis |

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| | |

| |Related Structures |

| | |

| | |

| |linea alba |

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| |calcaneal (Achilles’s) tendon |

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| |sciatic nerve |

Human & Cat Muscle Differences

1. pectoralis major- larger in human, smaller in cat

2. pectoralis minor- smaller in human, larger in cat

3. pectoantebrachialis – not present in human

4. Xiphihumeralis – not present in human

5. clavotrapezius, acromiotrapezius, spinotrapezius – three muscles in cat, one muscle in human (trapezius).

6. caudofemoralis – not present in human

7. gluteus maximus – larger than gluteus medius in humans, smaller than gluteus medius in cat.

8. sartorius – wide muscle in cat, narrow muscle in human

9. adductor femoris – one muscle in cat, three muscles (adductor longus, adductor brevis, adductor magnus) in human

10. epitrochlearis – not present in human

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