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Anatomy Final JF > Muscles (O, I, N, A) > Flashcards

Muscles (O, I, N, A) Flashcards

1
Q

External Intercostal

A

O: Lower margin of rib
I: Upper margin of next lower rib (courses obliquely forward and downward)
N: 1st to 11th intercostal nerves
A: Raises ribs (inspiration); supports intercostal spaces: stabilizes chest wall

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2
Q

Internal Intercostals

A

O: Lower margin of rib
I: Lower margin of next rib (courses obliquely forward and upward from costal angle to sternum)
N: 1st to 11th intercostal nerves
A: Lowers ribs (expiration); supports intercostal spaces; stabilizes chest wall

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3
Q

Innermost Intercostals

A

O: Lower margin of rib
I: Lower margin of next lower rib (courses obliquely forward and upward from costal angle to sternum)
N: 1st to 11th intercostal nerves
A: Lowers ribs (expiration); supports intercostal spaces; stabilizes chest wall

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4
Q

Subcostal

A

O: Lower margin of lower ribs
I: Inner surface of ribs 2 to 3 ribs below
N: Variable lower intercostal nerves
A: Raises ribs (inspiration)

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5
Q

Transversus Thoracis

A

O: Sternum and xiphoid process (Inner surface)
I: 2nd to 6th ribs (costal cartilage, inner surface)
N: 2nd to 7th intercostal nerves
A: Lowers ribs (expiration)

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6
Q

Diaphragm

A

O: [C] 7th-12th ribs (inner surface; lower margin of costal arch)
[L] Med- L1-L3 bodies; IV discs, and anterior longitudinal ligament as R and L crura
Lat- Lateral and medial arcuate ligaments
[S] Xiphoid process (posterior surface)
I: central tendon
N: Phrenic nerve (C3-C5 cervical plexus)
A: Principal muscle of respiration; aides in compressing abdominal viscera

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7
Q

Rectus Abdominis

A

O: Pubis between pubic tubercle and symphysis
I: Cartilages of 5th-7th ribs, xiphoid process of sternum
N: Intercostal nerves T5-T12
A: Flexes trunk, compresses abdomen, stabilizes pelvis

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8
Q

Pyramidalis

A

O: Pubis anterior to rectus abdominis
I: Linea alba (runs within rectus sheath)
N: Subcostal nerve (12th intercostal nerve)
A: Tenses linea alba

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9
Q

External Oblique

A

O: Outer surface of 5th-12th ribs
I: Linea alba, pubic tubercle, anterior iliac crest
N: Intercostal nerves T7-T12
A: [U] bends trunk to same side, rotates trunk to opposite side
[B] flexes trunk, compresses abdomen, stabilizes pelvis

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10
Q

Transversus Abdominis

A

O: 7th-12th costal cartilages (inner surface), thoracolumbar fascia (deep layer), iliac crest, ASIS (inner lip), iliopsoas fascia
I: Linea alba, pubic crest
N: Intercostal nerves T7-T12, iliohypogastric nerve, ilioinguinal nerve
A: [U] rotates trunk to same side [B] compresses abdomen

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11
Q

Psoas Major

A

O: [SL] T12-L4 vertebral bodies and associated IV discs (lateral surfaces) [DL] L1-L5 costal processes
I: Lesser trochanter of femur, joint insertion as iliopsoas muscle
N: Direct branches from lumbar plexus (L2-L4)
A: hip joint-flexion and ext rotation lumbar spine (with femur fixed) [U] contraction bends trunk laterally [B] contraction raises trunk from supine position

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12
Q

Iliacus

A

O: Iliac fossa
I: Lesser trochanter of femur, joint insertion as iliopsoas muscle
N: Femoral nerve (L2-L4)
A: hip joint-flexion and ext rotation lumbar spine (with femur fixed) [U] contraction bends trunk laterally [B] contraction raises trunk from supine position

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13
Q

Quadratus Lumborum

A

O: Iliac crest and iliolumbar ligament
I: 12th rib, L1-L4 vertebrae (transverse processes)
N: T12, L1-L4 spinal nerves
A: [U] bends trunk to same side [B] bearing down and expiration, stabilizes 12th rib

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14
Q

(Levator Ani)

Puborectalis

A

O: Superior pubic ramus (both sides)
I: Anococcygeal ligament
N: Direct branches of sacral plexus, inferior anal nerve
A: Supports pelvic viscera

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15
Q

(Levator Ani)

Pubococcygeus

A

O: Pubis
I: Anococcygeal ligament, coccyx
N: Direct branches of sacral plexus, inferior anal nerve
A: Supports pelvic viscera

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16
Q

(Levator Ani)

Iliococcygeus

A

O: Internal obturator fascia
I: Anococcygeal ligament, coccyx
N: Direct branches of sacral plexus, inferior anal nerve
A: Supports pelvic viscera

17
Q

Coccygeus

A

O: Sacrum
I: Ischial spine
N: Direct branches of sacral plexus
A: Supports pelvic viscera

18
Q

Piriformis

A

O: Sacrum
I: Greater trochanter of Femur
N: Direct branches of sacral plexus
A: Ext. rot of hip, stabilization, ABD of flexed hip

19
Q

Obturator Internus

A

O: Obturator membrane and boney boundaries
I: Greater trochanter of Femur
N: Direct branches of sacral plexus
A: Ext. rot. of hip, ABD of flexed hip

20
Q

Platysma

A

O: Skin over lower neck and upper lateral thorax
I: Mandible, skin over lower face and angle of mouth
N: Facial nerve (CN VII)
A: Depresses and wrinkles skin of lower face and mouth; tenses skin of neck; aids in forced depression of mandible

21
Q

Sternocleidomastoid

1) Sternal Head
2) Clavicular Head

A

O: 1) Sternum 2) Clavicle
I: Temporal bone (mastoid process), Occipital bone (superior nuchal line)
N: Accessory Nerve (CN XI)
A: [U] tilts head to same side, rotates head opposite side [B] extends head, aids in respiration when head is flexed

22
Q

Trapezius (Descending Part)

A

O: Occipital bone, spinous processes C1-C7
I: Clavicle (lateral 1/3)
N: Accessory Nerve (CN XI)
A: [U] draws cap obliquely upward, rotates gleaned cavity downward

23
Q

Digastric

1) Anterior Belly
2) Posterior Belly

A

O: 1) Mandible 2) Temporal bone
I: Hyoid bone via intermediate tendon
N: 1) Mylohyoid nerve (CN V3) 2) Facial nerve (CN VII)
A: Elevates hyoid bone (during swallowing), assists in opening mandible

24
Q

Stylohyoid

A

O: Temporal bone (styloid process)
I: Hyoid bone via split tendon
N: Facial nerve (CN VII)
A: Elevates hyoid bone (during swallowing), assists in opening mandible

25
Q

Mylohyoid

A

O: Mandible
I: Hyoid bone via median tendon of insertion
N: Mylohyoid nerve (CN V3)
A: Tightens and elevates oral floor, draws hyoid bone forward (swallowing), assists in opening mandible and moving it side to side (mastication)

26
Q

Geniohyoid

A

O: Mandible
I: Hyoid bone
N: Anterior rams of C1
A: Draws hyoid bone forward (swallowing), assists in opening mandible

27
Q

Omohyoid

A

O: Scapula (superior border)
I: Hyoid bone
N: Ansa cervicalis of cervical plexus
A: Depresses hyoid, draws larynx and hyoid down for phonation and terminal phases of swallowing

28
Q

Sternohyoid

A

O: Manubrium and SC joint
I: Hyoid bone
N: Ansa cervicalis of cervical plexus
A: Depresses hyoid, draws larynx and hyoid down for phonation and terminal phases of swallowing

29
Q

Thyrohyoid

A

O: Thyroid cartilage
I: Hyoid bone
N: C1 via hypoglossal nerve
A: Depresses and fixes hyoid, raises larynx during swallowing

30
Q

Scaleneus Anterior

A

O: C3-C6 (ant. tubercles of trans processes)
I: 1st rib
N: Direct branches from cervical + brachial plexus
A: Elevates upper ribs; [U] bends cervical spine to same side [B] flexes neck

31
Q

Scaleneus Medius

A

O: C1-C2 (trans processes) C3-C7 (post. tubercles of trans. processes)
I: 1st rib
N: Direct branches from cervical + brachial plexus
A: Elevates upper ribs; [U] bends cervical spine to same side [B] flexes neck

32
Q

Scaleneus Posterior

A

O: C5-C7 (post. tubercles of trans. processes)
I: 1st rib
N: Direct branches from cervical + brachial plexus
A: Elevates upper ribs; [U] bends cervical spine to same side [B] flexes neck

33
Q

Rectus Capitis Posterior Minor

A

O: C1 (posterior tubercle)
I: Occipital bone (inner 1/3 of inf. nuchal line)
N: Post. ramus of C1 (suboccipital nerve)
A: [U] rotates head same side [B] extends head

34
Q

Rectus Capitis Posterior Major

A

O: C2 (spinous process)
I: Occipital bone (mid 1/3 of inf. nuchal line)
N: Post. ramus of C1 (sub occipital nerve)
A: [U] tilts head same side [B] extends head

35
Q

Oblique Capitis Inferior

A

O: C2 (spinous process)
I: C1 (transverse process)
N: Post. rams of C1 (sub occipital nerve)
A: [U] tilts head same side, rotates to opposite side [B] extends head

36
Q

Obliquus Capitis Superior

A

O: C1 (transverse process)
I: Occipital bone (above RCPMajor)
N: Post. rams of C1 (sub occipital nerve)
A: [U] tilts head same side, rotates opposite side [B] extends head

Anatomy Final JF (7 decks)

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