lab manual_appendicular_skeleton_atlas (1)

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Pima Community College *

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Dec 6, 2023

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2 PRE-LAB EXERCISES When studying the skeletal system, the bones are often sorted into two broad categories: the axial skeleton and the appendicular skeleton. This lab focuses on the appendicular skeleton, which is formed from the pectoral and pelvic girdles and the upper and lower limbs. In addition to learning about all the bones of the appendicular skeleton, it is also important to identify some significant bone markings. Bone markings can have many shapes, including holes, round or sharp projections, and shallow or deep valleys, among others. These markings on the bones serve many purposes, including forming attachments to other bones or muscles and allowing passage of a blood vessel or nerve. It is helpful to understand the meanings of some of the more common bone marking terms. Before we get started, look up the definitions of these common bone marking terms: Canal : Condyle : Facet : Fissure : Foramen : Fossa : Margin : Process : Proximal : Trochanter : Tubercle : Tuberosity : Throughout this exercise, you will notice bold terms. This is meant to focus your attention on these important words. Make sure you pay attention to any bold words and know how to explain their definitions and/or where they are located. Use the following modules to guide your exploration of the appendicular skeleton. As you explore these bones in Visible Body’s app, also locate the bones and bone markings on any available charts, models, or specimens. You may also find it helpful to palpate bones on yourself or make drawings of the bones with the bone markings labeled. The drawings don’t have to be perfect; just make sure the different bone markings are in the correct locations, relative to each other. If you have trouble finding a bone or bone marking, you can always type its name into the search bar to get a list of 3D anatomical views where that bone or bone marking is highlighted for you. To access disarticulated bones with color-coded bone markings, select a bone, and then, in the content box, choose the landmark icon, which shows a bone with pink, yellow, and blue ends.
3 IN-LAB EXERCISES Open Visible Body Suite. Search for and select each of the Skeletal System Views noted in the exercises below . You are responsible for the identification of all bold terms . A. Pectoral Girdle Open the Skeletal System View “Shoulder Girdle” to identify the clavicles and scapulae . The clavicles and scapulae make up the pectoral girdle and are responsible for attaching the upper limbs to the skeleton as well as providing attachment points for the shoulder muscles. Open the Skeletal System View “Axillary Region” to observe how muscles attach to the clavicles and scapulae . You can select the systems icons on the left side of the screen to hide blood vessels, lymphatic vessels, and nerves. The shoulder has the largest range of motion of any joint in the body, and the many muscles that attach here stabilize the pectoral girdle to allow for that movement. After identifying the bones and how they function in muscle stabilization, find their bone markings and answer the questions. Clavicle Humerus Scapula
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4 Supraspinatus muscle Infraspinatus muscle Deltoid muscle (posterior head) Clavicle Deltoid muscle (anterior head) Scapula Deltoid muscle (middle head)
5 1. Scapula Inferior angle Lateral border Neck Glenoid cavity Coracoid process Subscapular fossa Medial border Superior angle Suprascapular notch Supraspinous fossa Superior angle Medial border Acromion Neck Infraspinous fossa Lateral border Inferior angle Scapular spine
6 a. Identify the following bone markings: i. Glenoid cavity ii. Spine iii. Acromion iv. Coracoid process v. Infraspinous fossa vi. Supraspinous fossa vii. Subscapular fossa viii. Inferior angle ix. Superior angle x. Lateral border xi. Medial border xii. Neck xiii. Acromial angle b. Describe how to determine a right scapula from a left scapula.
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7 2. Clavicle a. Identify the following bone markings: i. Acromial end ii. Sternal end iii. Shaft iv. Conoid tubercle b. Describe how the clavicle curves and articulates with other bones. Acromial end Sternal end Shaft Conoid tubercle
8 B. Upper Limb Open the Skeletal System View “Full Skeleton” to identify the bones of the upper limb . The upper limb consists of the bones of the arm, forearm, wrist, and hand. Zoom in on the arm and identify the following bones and bone markings, and then zoom out again to look at the full arm and observe how the individual bones fit together. Note how processes often fit into the fossae of the same name. Clavicle Scapula Bones of the hand Carpal bones (wrist) Humerus Radius Ulna
9 1. Humerus a. Identify the following bone markings: i. Head ii. Anatomical neck iii. Surgical neck iv. Shaft v. Greater tubercle vi. Lesser tubercle Deltoid tuberosity Trochlea Lateral epicondyle Capitulum Intertubercular groove Greater tubercle Lesser tubercle Shaft Surgical neck Head Neck Medial epicondyle Coronoid fossa
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10 vii. Intertubercular groove viii. Radial groove ix. Deltoid tuberosity x. Trochlea xi. Capitulum xii. Coronoid fossa xiii. Olecranon fossa xiv. Medial epicondyle xv. Lateral epicondyle xvi. Radial fossa b. Describe the difference in position of the anatomical neck and the surgical neck.
11 2. Radius a. Identify the following bone markings: i. Head ii. Neck iii. Shaft iv. Tubercle v. Styloid process vi. Ulnar notch Styloid process Shaft Ulnar notch Head Tubercle
12 3. Ulna a. Identify the following bone markings: i. Coronoid process ii. Olecranon iii. Radial notch iv. Trochlear notch v. Styloid process vi. Head vii. Shaft Head Radial notch Tuberosity Shaft Styloid process Olecranon Trochlear notch Coronoid process
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13 b. How do the bones of the radius and ulna attach to each other? c. Describe how the radius and ulna attach to and rotate around the humerus when the elbow flexes. Ulna Humerus Radius
14 4. Carpus To see the carpals more clearly, hide some or all of the ligaments on the wrist after you zoom in. Scaphoid Trapezium Trapezoid Lunate Triquetral Hamate Capitate Carpus (Posterior)
15 a. Identify the following carpal bones: i. Lunate ii. Scaphoid iii. Trapezium iv. Trapezoid v. Capitate vi. Hamate vii. Triquetral viii. Pisiform Pisiform Hamate Triquetral Lunate Trapezoid Capitate Trapezium Scaphoid Carpus (Anterior)
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16 5. Hand Note the nomenclature for the bones of the hand. The thumb is considered digit I, while the pinky finger is digit V. The metacarpals and phalanges are numbered accordingly. Distal phalanges Middle phalanges Proximal phalanges Metacarpals a. Identify the following hand bones: i. Metacarpals ii. Proximal phalanges iii. Middle phalanges iv. Distal phalanges b. List all the bones on your thumb from proximal to distal. Do the same for your pinky finger. What is the difference?
17 C. Pelvic Girdle Open the Skeletal System View “Pelvic Girdle” to identify the ilium, ischium, and pubis . Just like the pectoral girdle attaches the upper limbs to the skeleton, the pelvic girdle attaches the lower limbs to the skeleton. The pelvic girdle consists of the right and left hip bones and the sacrum that connects the hip bones on the posterior side. You may remember the sacrum from studying the axial skeleton, because it is part of the vertebral column. Each of the hip bones begins as three separate bones: the ilium , ischium , and pubis . These bones eventually fuse together, but bone markings are still considered to belong to one of these three distinct regions. Observe the following bone markings on the ilium, ischium, and pubis, and then try to find the same bone markings on the entire hip bone. Hip bone Ilium Sacrum Pubis Ischium Pubic symphysis
18 1. Ilium a. Identify the following bone markings: i. Body ii. Iliac crest iii. Iliac fossa iv. Acetabulum v. Anterior inferior iliac spine vi. Anterior superior iliac spine vii. Posterior inferior iliac spine viii. Posterior superior iliac spine ix. Auricular surface x. Greater sciatic notch Anterior superior iliac spine Iliac crest Anterior interior iliac spine Greater sciatic notch Posterior superior iliac spine Posterior inferior iliac spine
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19 2. Ischium a. Identify the following bone markings: i. Body ii. Ramus iii. Acetabulum iv. Lesser sciatic notch v. Ischial tuberosity vi. Ischial spine vii. Pubic arch viii. Obturator foramen (ischial surface) Acetabular rim Body Obturator foramen (ischial surface) Ramus Ischial spine Ischial tuberosity
20 3. Pubis 4. Where does the lower limb attach to the hip bone? Which part of the hip bone is this? 5. The male and female pelvises have a few differences due to childbearing adaptations. Observe the pelvises by selecting the Tour “Pelvis Comparison” and answer the following questions. If the tour is not already in your app, add it now using the following sharelink: https://apps.visiblebody.com/share/?p=vbhaa&t=4_28238_637528914355439910_1009619 Superior ramus Pubic arch Inferior ramus Pubic tubercle Pubic crest Obturator crest Body Iliopubic eminence Acetabular notch Obturator foramen, pubis surface a. Identify the following bone markings: i. Body ii. Acetabulum iii. Superior ramus iv. Inferior ramus v. Pubic arch vi. Pubic crest vii. Pubic tubercle viii. Obturator crest ix. Obturator foramen (pubis surface)
21 Pubic arch Pelvic brim Pubic arch Pelvic brim
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22 a. Does the male or female pelvis have more space inside? b. Describe what the pelvic brim is. c. How is the pelvic brim different in males vs. females? d. Describe what the pubic arch is. e. How is the pubic arch different in males vs. females?
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23 D. Lower Limb Open the Skeletal System View “Full Skeleton” to identify the bones of the lower limb . In addition to their importance in movement, the lower limb bones support the weight of the rest of the body. As a result, they are generally larger and heavier than the bones of the upper limb. Head of femur Femur Patella Tibia Fibula Hip bone
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24 1. Femur a. Identify the following bone markings: i. Head ii. Shaft iii. Greater trochanter iv. Lesser trochanter v. Neck vi. Lateral condyle vii. Lateral epicondyle viii. Medial condyle Head Neck Lesser trochanter Shaft Patellar surface Medial epicondyle Medial condyle Greater trochanter Lateral epicondyle Lateral condyle
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25 ix. Medial epicondyle x. Intercondylar fossa xi. Gluteal tuberosity xii. Linea aspera xiii. Patellar surface xiv. Popliteal surface b. Describe how you would differentiate between a right femur and a left femur.
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26 a. Identify the following bone markings: i. Shaft ii. Medial condyle iii. Lateral condyle iv. Intercondylar area v. Tibial tuberosity vi. Anterior border vii. Medial malleolus 2. Tibia Medial condyle Intercondylar area Tibial tuberosity Anterior border Medial malleolus Tubercles of intercondylar eminence Lateral condyle Shaft Fibular notch
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27 a. Identify the following bone markings: i. Head ii. Shaft iii. Lateral malleolus 3. Fibula Head Lateral malleolus Shaft
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28 a. Which bones compose the knee joint? b. Where do the different bones attach to each other? 4. Patella Femur Fibula Lateral condyle of tibia Lateral condyle of femur Patella Medial condyle of femur Patellar ligament Medial condyle of tibia Tibia
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29 a. Identify the following tarsal bones: i. Calcaneus ii. Talus iii. Medial cuneiform iv. Intermediate cuneiform v. Lateral cuneiform vi. Cuboid vii. Navicular b. Which bone forms the heel of the foot? 5. Tarsus To see the tarsals more clearly, hide some or all of the ligaments on the wrist after you zoom in. Fibula Calcaneus Cuboid Lateral cuneiform Tibia Talus Medial cuneiform Intermediate cuneiform Navicular
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30 a. Identify the following foot bones: i. Metatarsals ii. Proximal Phalanges iii. Middle Phalanges iv. Distal Phalanges 6. Foot Note that the nomenclature for the toes is the same as for the hand. The big toe is considered digit I, and the pinky toe is digit V. Metatarsals Proximal phalanges Distal phalanges Middle phalanges
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31 PUTTING IT ALL TOGETHER 1. How is the shape of the glenoid cavity of the scapula different from that of the acetabulum in the hip bone? How do the shapes of these bone markings affect the range of motion at their respective joints? 2. How do the distinct characteristics of the female pelvis make childbirth easier? 3. Which bone markings are responsible for making the protrusions of the ankles, just above the feet? 4. When someone falls with an outstretched arm, a broken clavicle often results. Physically, how would that person appear afterward? What is the function of the clavicle? TIME TO PRACTICE! SEARCH FOR AND TAKE THE FOLLOWING SKELETAL SYSTEM QUIZZES: GIRDLES, UPPER LIMB, HAND, LOWER LIMB, AND FOOT
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32
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33 Source: Skeletal System View “Shoulder Girdle”
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34 Source: Skeletal System View “Axillary Region”
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35 Scapula (Anterior) Source: Skeletal System View “Axillary Region”
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36 Scapula (Posterior) Source: Skeletal System View “Axillary Region”
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37 Clavicle
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38 Source: Skeletal System View “Full Skeleton”
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39 Humerus
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40 Radius
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41 Ulna
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42 Radius and Ulna
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43 Carpus (Posterior)
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44 Carpus (Anterior)
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45 Hand
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46 Source: Skeletal System View “Pelvic Girdle”
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47 Ilium
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48 Ischium
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49 Pubis
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50 Source: Tour “Pelvis Comparison”
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51 Source: Tour “Pelvis Comparison”
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52 Source: Skeletal System View “Lower Limb”
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53 Femur
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54 Tibia
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55 Fibula
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56 Patella
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57 Tarsus
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58 Foot
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